# AI Fit Hub
> 57 tools, 186 long-form articles, and 247 learning resources at https://aifithub.io
> No signup. No cookies. Privacy-friendly server-side aggregate analytics only.

## Discovery
- Homepage: https://aifithub.io/
- Tools: https://aifithub.io/tools/
- Articles: https://aifithub.io/articles/
- Reference data: https://aifithub.io/reference/
- Benchmarks: https://aifithub.io/benchmarks/
- Resources: https://aifithub.io/resources/
- Agent guide: https://aifithub.io/for-agents/
- Tool index JSON: https://aifithub.io/agent-tools.json
- Engines manifest: https://aifithub.io/engines/manifest.json
- WebMCP manifest: https://aifithub.io/.well-known/webmcp.json
- Search index: https://aifithub.io/search-index.json
- Full notes: https://aifithub.io/llms-full.txt

> Tools are callable as static ES modules at /engines/{slug}.js — see the Engines section for the full list.

## Start Here — Most Referenced
> Hand-picked entry points; the highest-demand pages on the hub for agents that read only the top of this file.
- Minetti energy cost of uphill/downhill running (https://aifithub.io/articles/minetti-energy-cost-uphill-downhill-methodology/): the metabolic cost-of-gradient curve, with the original Minetti data and how pace adjusts per grade.
- Calorie counting vs intuitive eating (https://aifithub.io/compare/calorie-counting-vs-intuitive-eating/): what the adherence and outcome studies actually show for each approach.
- Evidence-based programming 2026 (https://aifithub.io/articles/evidence-based-programming-2026/): sets, frequency, and progression from the current training literature.
- Zone 2 training, what the literature says (https://aifithub.io/articles/zone-2-training-what-the-literature-says/): the actual evidence behind the low-intensity endurance hype.
- Protein for lifters (https://aifithub.io/articles/protein-for-lifters-2026/): Morton 2018's 1.6 g/kg/day with the meta-analytic confidence interval.
- One-rep-max calculator (https://aifithub.io/one-rep-max-calculator/): Epley, Brzycki, and Lombardi estimates from reps to failure.
- Oura Ring 5 vs WHOOP 5.0 vs Galaxy Ring 2026 (https://aifithub.io/articles/oura-ring-5-vs-whoop-5-vs-galaxy-ring-2026/): verified prices for the three flagship recovery wearables — Oura tracks sleep best, WHOOP coaches recovery, Galaxy Ring skips the subscription.
- MacroFactor vs Cronometer 2026 (https://aifithub.io/articles/macrofactor-vs-cronometer-2026/): verified prices and free tiers — MacroFactor has adaptive TDEE coaching, Cronometer tracks micronutrients deeper.
- Best smart rings 2026 (https://aifithub.io/articles/best-smart-rings-2026/): verified pricing — the Oura Ring 4 wins overall on validated sleep data; the Ultrahuman Ring PRO is the best subscription-free pick.

## Engines (57 total)

> Every tool ships its pure compute as a static ES module at `/engines/{slug}.js`. Agents and LLM clients import the module and call `compute(input)` — same math, same result shape as the in-browser UI. Self-contained: no external imports, browser/Node/Deno-safe ES2020.

Manifest with input/output JSON Schemas: https://aifithub.io/engines/manifest.json

Example:
```js
const { compute } = await import("https://aifithub.io/engines/bmi-calculator.js");
const result = compute({ weight_kg: 80, height_cm: 178 });
```

- TDEE Calculator: https://aifithub.io/engines/tdee-calculator.js
- BMR Calculator: https://aifithub.io/engines/bmr-calculator.js
- Macro Calculator: https://aifithub.io/engines/macro-calculator.js
- BMI Calculator: https://aifithub.io/engines/bmi-calculator.js
- Calorie Deficit Calculator: https://aifithub.io/engines/calorie-deficit-calculator.js
- Body Recomposition Planner: https://aifithub.io/engines/body-recomposition-planner.js
- Progressive Overload Planner: https://aifithub.io/engines/progressive-overload-planner.js
- One-Rep Max Calculator: https://aifithub.io/engines/one-rep-max-calculator.js
- Body Fat Percentage Calculator: https://aifithub.io/engines/body-fat-percentage-calculator.js
- Protein Intake Calculator: https://aifithub.io/engines/protein-intake-calculator.js
- Ideal Weight Calculator: https://aifithub.io/engines/ideal-weight-calculator.js
- Running Pace Calculator: https://aifithub.io/engines/running-pace-calculator.js
- Heart Rate Zone Calculator: https://aifithub.io/engines/heart-rate-zone-calculator.js
- Water Intake Calculator: https://aifithub.io/engines/water-intake-calculator.js
- Waist-to-Hip Ratio Calculator: https://aifithub.io/engines/waist-to-hip-ratio-calculator.js
- Sleep Calculator: https://aifithub.io/engines/sleep-calculator.js
- FFMI Calculator: https://aifithub.io/engines/ffmi-calculator.js
- VO2 Max Estimator: https://aifithub.io/engines/vo2-max-estimator.js
- Strength Standards Calculator: https://aifithub.io/engines/strength-standards-calculator.js
- DOTS & Wilks Score Calculator: https://aifithub.io/engines/dots-score-calculator.js
- Lean Body Mass Calculator: https://aifithub.io/engines/lean-body-mass-calculator.js
- Walking Calorie Calculator: https://aifithub.io/engines/walking-calorie-calculator.js
- Calories Burned Calculator: https://aifithub.io/engines/calories-burned-calculator.js
- Intermittent Fasting Window Planner: https://aifithub.io/engines/intermittent-fasting-window-planner.js
- Creatine Intake Calculator: https://aifithub.io/engines/creatine-intake-calculator.js
- Workout Volume Calculator: https://aifithub.io/engines/workout-volume-calculator.js
- Food-to-Exercise Converter: https://aifithub.io/engines/food-to-exercise-converter.js
- Resting Heart Rate Calculator: https://aifithub.io/engines/resting-heart-rate-calculator.js
- Flexibility Score Calculator: https://aifithub.io/engines/flexibility-score-calculator.js
- Swim Pace Calculator: https://aifithub.io/engines/swim-pace-calculator.js
- Run Training Paces Calculator: https://aifithub.io/engines/run-training-paces-calculator.js
- Sweat Rate Calculator: https://aifithub.io/engines/sweat-rate-calculator.js
- Race Time Predictor: https://aifithub.io/engines/race-time-predictor.js
- Cycling Power & FTP Zone Calculator: https://aifithub.io/engines/cycling-power-ftp-zone-calculator.js
- Plate Loading Calculator: https://aifithub.io/engines/plate-loading-calculator.js
- Treadmill Pace Converter: https://aifithub.io/engines/treadmill-pace-converter.js
- Zone 2 Heart Rate Calculator: https://aifithub.io/engines/zone-2-heart-rate-calculator.js
- DOTS vs Wilks vs GL Calculator: https://aifithub.io/engines/dots-wilks-gl-combined-calculator.js
- RPE to Percentage Converter: https://aifithub.io/engines/rpe-to-percentage-converter.js
- Strength Percentile Calculator: https://aifithub.io/engines/strength-percentile-calculator.js
- Meet Day Attempt Selector: https://aifithub.io/engines/meet-day-attempt-selector.js
- Hybrid Training Planner: https://aifithub.io/engines/hybrid-training-planner.js
- Sleep Debt Calculator: https://aifithub.io/engines/sleep-debt-calculator.js
- Macro Cycling Calculator: https://aifithub.io/engines/macro-cycling-calculator.js
- Muscle Gain Potential Calculator: https://aifithub.io/engines/muscle-gain-potential-calculator.js
- Wendler 5/3/1 Planner: https://aifithub.io/engines/wendler-531-planner.js
- Smolov / Sheiko / Texas Method Cycles: https://aifithub.io/engines/smolov-sheiko-texas-cycles.js
- Velocity-Based 1RM Estimator: https://aifithub.io/engines/velocity-based-1rm.js
- Concurrent Training Interference Estimator: https://aifithub.io/engines/concurrent-training-interference.js
- Detraining Decay Estimator: https://aifithub.io/engines/detraining-decay.js
- Junk Volume Detector: https://aifithub.io/engines/junk-volume-detector.js
- Marathon Pace + Elevation Calculator: https://aifithub.io/engines/marathon-pace-elevation.js
- Sweat-Rate + Electrolyte Marathon Plan: https://aifithub.io/engines/sweat-rate-electrolyte-marathon.js
- Race-Week Taper Planner: https://aifithub.io/engines/race-week-taper.js
- Female Athlete Formula Suite: https://aifithub.io/engines/female-athlete-formula-suite.js
- HRV Deload Trigger: https://aifithub.io/engines/hrv-deload-trigger.js
- Hybrid Athlete Macro Split: https://aifithub.io/engines/hybrid-athlete-macro-split.js

## Reference data (6 surfaces)

> Parameter sweeps of deterministic engines across full input grids. Every cell is live /engines/{slug}.js output, recomputed at build, downloadable as CSV, free to cite (CC BY 4.0).

- Index: https://aifithub.io/reference/
- Squat strength percentile by bodyweight and 1RM (56-cell grid, male): https://aifithub.io/reference/strength-percentile-by-bodyweight-and-lift/
  CSV download: in-page data: URI (column: bodyweight_kg, weight_lifted_kg, percentile, level, estimated_1rm_kg)
  Engine: https://aifithub.io/engines/strength-percentile-calculator.js
- One-rep max by reps and weight lifted (48-cell grid): https://aifithub.io/reference/one-rep-max-by-reps-and-weight/
  CSV download: in-page data: URI (column: reps, weight_lifted_kg, average_1rm_kg, training_max_90_kg, training_max_85_kg)
  Engine: https://aifithub.io/engines/one-rep-max-calculator.js
- FFMI by bodyweight and body-fat percentage (42-cell grid, 180 cm): https://aifithub.io/reference/ffmi-by-bodyweight-and-body-fat/
  CSV download: in-page data: URI (column: bodyweight_kg, body_fat_pct, ffmi, adjusted_ffmi, fat_free_mass_kg)
  Engine: https://aifithub.io/engines/ffmi-calculator.js
- TDEE by bodyweight and activity level (35-cell grid, 35y male, 178 cm): https://aifithub.io/reference/tdee-by-bodyweight-and-activity-level/
  CSV download: in-page data: URI (column: bodyweight_kg, activity_level, activity_factor, bmr_kcal, tdee_kcal)
  Engine: https://aifithub.io/engines/tdee-calculator.js
- Body fat by waist and neck circumference (42-cell grid, U.S. Navy, male, 180 cm): https://aifithub.io/reference/body-fat-by-waist-and-neck/
  CSV download: in-page data: URI (column: waist_cm, neck_cm, body_fat_pct, category)
  Engine: https://aifithub.io/engines/body-fat-percentage-calculator.js
- Macros by calories and bodyweight (42-cell grid): https://aifithub.io/reference/macros-by-calories-and-bodyweight/
  CSV download: in-page data: URI (column: calories_kcal, bodyweight_kg, protein_g, carb_g, fat_g)
  Engine: https://aifithub.io/engines/macro-calculator.js

## Benchmarks (1 surface)

> Controlled comparisons computed live from deterministic engines, recomputed at build, downloadable as CSV, free to cite (CC BY 4.0). These compare engine outputs, not vendor marketing claims.

- Index: https://aifithub.io/benchmarks/
- 2026 one-rep-max formula disagreement (48-cell grid: 8 rep counts × 6 formulas, fixed 100 kg lift): https://aifithub.io/benchmarks/one-rep-max-formula-disagreement/
  CSV download: in-page data: URI (columns: reps, weight_lifted_kg, epley_1rm_kg, brzycki_1rm_kg, lombardi_1rm_kg, mayhew_1rm_kg, wathen_1rm_kg, lander_1rm_kg, average_1rm_kg, spread_kg, spread_pct)
  Engine: https://aifithub.io/engines/one-rep-max-calculator.js

## Tools (57 total)

### TDEE Calculator
- URL: https://aifithub.io/tdee-calculator/
- Category: Nutrition
- Summary: Estimate your daily energy expenditure with Mifflin-St Jeor + activity factors.

### BMR Calculator
- URL: https://aifithub.io/bmr-calculator/
- Category: Nutrition
- Summary: Estimate basal metabolic rate and maintenance calories using Mifflin-St Jeor assumptions.

### Macro Calculator
- URL: https://aifithub.io/macro-calculator/
- Category: Nutrition
- Summary: Convert calorie targets into protein, carbs, and fat grams for your goal.

### BMI Calculator
- URL: https://aifithub.io/bmi-calculator/
- Category: Body Composition
- Summary: Calculate BMI quickly with a plain-language range explanation and limitations.

### Calorie Deficit Calculator
- URL: https://aifithub.io/calorie-deficit-calculator/
- Category: Planning
- Summary: Estimate required daily calorie deficit for a target timeline and bodyweight change.

### Body Recomposition Planner
- URL: https://aifithub.io/body-recomposition-planner/
- Category: Planning
- Summary: Plan body-fat reduction pace, deficit targets, and protein needs around a timeline.

### Progressive Overload Planner
- URL: https://aifithub.io/progressive-overload-planner/
- Category: Strength
- Summary: Project lifting progression with weekly overload and planned deload cycles.

### One-Rep Max Calculator
- URL: https://aifithub.io/one-rep-max-calculator/
- Category: Strength
- Summary: Estimate one-rep max with Epley, Brzycki, and Lombardi formulas.

### Body Fat Percentage Calculator
- URL: https://aifithub.io/body-fat-percentage-calculator/
- Category: Body Composition
- Summary: Estimate body fat percentage using the U.S. Navy circumference method.

### Protein Intake Calculator
- URL: https://aifithub.io/protein-intake-calculator/
- Category: Nutrition
- Summary: Get daily protein targets based on training level and goal.

### Ideal Weight Calculator
- URL: https://aifithub.io/ideal-weight-calculator/
- Category: Body Composition
- Summary: Compare Devine, Robinson, Miller, and Hamwi formulas as a realistic range.

### Running Pace Calculator
- URL: https://aifithub.io/running-pace-calculator/
- Category: Cardio
- Summary: Calculate pace per km and mile and project race finish times from one run.

### Heart Rate Zone Calculator
- URL: https://aifithub.io/heart-rate-zone-calculator/
- Category: Recovery
- Summary: Calculate personalized training zones with the Karvonen method.

### Water Intake Calculator
- URL: https://aifithub.io/water-intake-calculator/
- Category: Nutrition
- Summary: Calculate daily water intake based on weight, activity level, and climate.

### Waist-to-Hip Ratio Calculator
- URL: https://aifithub.io/waist-to-hip-ratio-calculator/
- Category: Body Composition
- Summary: Calculate waist-to-hip ratio and assess body composition using WHO guidelines.

### Sleep Calculator
- URL: https://aifithub.io/sleep-calculator/
- Category: Recovery
- Summary: Calculate optimal bed and wake times based on 90-minute sleep cycles.

### FFMI Calculator
- URL: https://aifithub.io/ffmi-calculator/
- Category: Body Composition
- Summary: Calculate Fat-Free Mass Index to gauge muscularity and compare against natural benchmarks.

### VO2 Max Estimator
- URL: https://aifithub.io/vo2-max-estimator/
- Category: Cardio
- Summary: Estimate aerobic capacity with the Cooper 12-minute run or Rockport 1-mile walk field tests.

### Strength Standards Calculator
- URL: https://aifithub.io/strength-standards-calculator/
- Category: Strength
- Summary: Rank your lifts from Beginner to Elite based on bodyweight ratios.

### DOTS & Wilks Score Calculator
- URL: https://aifithub.io/dots-score-calculator/
- Category: Strength
- Summary: DOTS & Wilks score calculator: compare powerlifting strength across weight classes with IPF DOTS and Wilks-2020 coefficients.

### Lean Body Mass Calculator
- URL: https://aifithub.io/lean-body-mass-calculator/
- Category: Body Composition
- Summary: Estimate lean body mass using Boer, James, and Hume formulas from height and weight.

### Walking Calorie Calculator
- URL: https://aifithub.io/walking-calorie-calculator/
- Category: Cardio
- Summary: Estimate calories burned from walking using speed, duration, body weight, and incline.

### Calories Burned Calculator
- URL: https://aifithub.io/calories-burned-calculator/
- Category: Cardio
- Summary: Estimate exercise calorie burn from body weight, duration, MET intensity, and incline.

### Intermittent Fasting Window Planner
- URL: https://aifithub.io/intermittent-fasting-window-planner/
- Category: Nutrition
- Summary: Plan protocol-based eating and fasting windows with a 24-hour timeline and 5:2 day picker.

### Creatine Intake Calculator
- URL: https://aifithub.io/creatine-intake-calculator/
- Category: Nutrition
- Summary: Estimate creatine maintenance and loading doses from body weight and training frequency.

### Workout Volume Calculator
- URL: https://aifithub.io/workout-volume-calculator/
- Category: Strength
- Summary: Calculate total training volume and compare against optimal ranges per muscle group.

### Food-to-Exercise Converter
- URL: https://aifithub.io/food-to-exercise-converter/
- Category: Nutrition
- Summary: See how long you need to exercise to burn off any food, personalized by bodyweight.

### Resting Heart Rate Calculator
- URL: https://aifithub.io/resting-heart-rate-calculator/
- Category: Cardio
- Summary: Assess cardiovascular fitness from your resting heart rate — classification, cardio age, and improvement targets.

### Flexibility Score Calculator
- URL: https://aifithub.io/flexibility-score-calculator/
- Category: Body Composition
- Summary: Estimate your flexibility percentile and rating from a sit-and-reach test score, adjusted for age and sex.

### Swim Pace Calculator
- URL: https://aifithub.io/swim-pace-calculator/
- Category: Cardio
- Summary: Calculate swim pace, total time, or distance with SWOLF and effort-zone context.

### Run Training Paces Calculator
- URL: https://aifithub.io/run-training-paces-calculator/
- Category: Cardio
- Summary: Get personalized Easy, Tempo, Threshold, Interval, and Speed training paces from a recent race time using the Daniels VDOT method.

### Sweat Rate Calculator
- URL: https://aifithub.io/sweat-rate-calculator/
- Category: Recovery
- Summary: Calculate your personal sweat rate from pre/post-exercise weigh-ins and estimate fluid and sodium losses using ACSM guidelines.

### Race Time Predictor
- URL: https://aifithub.io/race-time-predictor/
- Category: Cardio
- Summary: Race Time predictor: predict finish times across 5K, 10K, half marathon, and marathon from any known race result using Riegel's formula.

### Cycling Power & FTP Zone Calculator
- URL: https://aifithub.io/cycling-power-ftp-zone-calculator/
- Category: Cardio
- Summary: Calculate your 7 Coggan power training zones from FTP or a 20-minute test result with W/kg ratio.

### Plate Loading Calculator
- URL: https://aifithub.io/plate-loading-calculator/
- Category: Strength
- Summary: Calculate which weight plates to load on each side of a barbell to hit your target weight in kg or lbs.

### Treadmill Pace Converter
- URL: https://aifithub.io/treadmill-pace-converter/
- Category: Cardio
- Summary: Convert treadmill speed to running pace with incline-adjusted flat equivalent, projected race times, and calorie estimates.

### Zone 2 Heart Rate Calculator
- URL: https://aifithub.io/zone-2-heart-rate-calculator/
- Category: Cardio
- Summary: Calculate your Zone 2 heart rate with Maffetone, Karvonen, % Max HR, and lactate threshold methods compared side by side.

### DOTS vs Wilks vs GL Calculator
- URL: https://aifithub.io/dots-wilks-gl-combined-calculator/
- Category: Strength
- Summary: Compare DOTS, Wilks, and Goodlift scores side by side to see which system rates your powerlifting total highest.

### RPE to Percentage Converter
- URL: https://aifithub.io/rpe-to-percentage-converter/
- Category: Strength
- Summary: Convert RPE and reps to percentage of 1RM with a full interactive RPE chart based on the Tuchscherer table.

### Strength Percentile Calculator
- URL: https://aifithub.io/strength-percentile-calculator/
- Category: Strength
- Summary: Find out where your squat, bench, deadlift, or OHP ranks against other lifters by bodyweight and sex.

### Meet Day Attempt Selector
- URL: https://aifithub.io/meet-day-attempt-selector/
- Category: Strength
- Summary: Plan powerlifting meet attempts with opener, second, and third attempt suggestions based on 1RM and confidence.

### Hybrid Training Planner
- URL: https://aifithub.io/hybrid-training-planner/
- Category: Planning
- Summary: Hybrid training planner: build a weekly schedule that balances running and lifting with interference warnings and recovery guidance.

### Sleep Debt Calculator
- URL: https://aifithub.io/sleep-debt-calculator/
- Category: Recovery
- Summary: Track 7 nights of sleep to calculate accumulated sleep debt with a recovery timeline and quality assessment.

### Macro Cycling Calculator
- URL: https://aifithub.io/macro-cycling-calculator/
- Category: Nutrition
- Summary: Calculate different macros for training days and rest days with carb cycling for recomp, lean bulk, or cut goals.

### Muscle Gain Potential Calculator
- URL: https://aifithub.io/muscle-gain-potential-calculator/
- Category: Body Composition
- Summary: Estimate your natural muscular potential with the Casey Butt model and see how close you are to your genetic limit.

### Wendler 5/3/1 Planner
- URL: https://aifithub.io/wendler-531-planner/
- Category: Strength
- Summary: Generate a 4-week Wendler 5/3/1 cycle from squat, bench, deadlift, and overhead-press 1RMs.

### Smolov / Sheiko / Texas Method Cycles
- URL: https://aifithub.io/smolov-sheiko-texas-cycles/
- Category: Strength
- Summary: Generate full Smolov base, Sheiko #29, or Texas Method cycles from a single 1RM input.

### Velocity-Based 1RM Estimator
- URL: https://aifithub.io/velocity-based-1rm/
- Category: Strength
- Summary: Estimate one-rep max from concentric bar velocity using published load-velocity profiles.

### Concurrent Training Interference Estimator
- URL: https://aifithub.io/concurrent-training-interference/
- Category: Planning
- Summary: Estimate strength, hypertrophy, and power gain attenuation from running while lifting (Wilson 2012).

### Detraining Decay Estimator
- URL: https://aifithub.io/detraining-decay/
- Category: Planning
- Summary: Estimate 1RM loss across a layoff using the Mujika & Padilla detraining model.

### Junk Volume Detector
- URL: https://aifithub.io/junk-volume-detector/
- Category: Planning
- Summary: Junk volume detector: paste a multi-week CSV training log and identify sets that don't drive strength or hypertrophy.

### Marathon Pace + Elevation Calculator
- URL: https://aifithub.io/marathon-pace-elevation/
- Category: Cardio
- Summary: Convert a target marathon time on a hilly course into the flat-equivalent pace you actually need.

### Sweat-Rate + Electrolyte Marathon Plan
- URL: https://aifithub.io/sweat-rate-electrolyte-marathon/
- Category: Cardio
- Summary: Compute marathon sweat rate, fluid intake, and sodium replacement plan from a single training session.

### Race-Week Taper Planner
- URL: https://aifithub.io/race-week-taper/
- Category: Planning
- Summary: Build a race-week taper using the Bosquet 2007 meta-analysis with distance-aware depth and weekly plan.

### Female Athlete Formula Suite
- URL: https://aifithub.io/female-athlete-formula-suite/
- Category: Body Composition
- Summary: Apply female-specific corrections to FFMI, Mifflin-St Jeor BMR, max heart rate, and body-fat estimation.

### HRV Deload Trigger
- URL: https://aifithub.io/hrv-deload-trigger/
- Category: Recovery
- Summary: Decide whether to deload from 7 days of HRV vs 30-day baseline using the Plews 2014 method.

### Hybrid Athlete Macro Split
- URL: https://aifithub.io/hybrid-athlete-macro-split/
- Category: Nutrition
- Summary: Get protein, carb, and fat targets for athletes who run + lift, with training-day vs rest-day split.

## Articles (186 total)

### Pillar guides (44)
- Body Composition: The Four Lenses: https://aifithub.io/articles/body-composition-the-evidence/
- Endurance Training: The Evidence-Based Levers: https://aifithub.io/articles/endurance-training-the-evidence/
- GLP-1 Muscle Loss: Keep Lean Mass with Lifting and Protein: https://aifithub.io/articles/glp-1-muscle-loss-resistance-training-protein/
- How to Build Muscle: The Evidence-Based Levers: https://aifithub.io/articles/how-to-build-muscle-the-evidence/
- Light vs Heavy Weights for Muscle Growth: The Evidence: https://aifithub.io/articles/light-vs-heavy-loads-hypertrophy/
- Training to Failure vs Reps in Reserve: What Works: https://aifithub.io/articles/training-to-failure-vs-reps-in-reserve/
- VO2 Max and Longevity: The 122,000-Patient Mortality Study: https://aifithub.io/articles/vo2max-all-cause-mortality/
- TDEE Maintenance Calorie Reference: Age and Activity Level 2026: https://aifithub.io/articles/tdee-maintenance-calorie-reference-by-age-and-activity-2026/
- The 2026 Wearable & AI-Coaching Accuracy vs Value Index: https://aifithub.io/articles/wearable-ai-coaching-accuracy-value-index-2026/
- Concurrent Training Interference Effect on Hypertrophy: https://aifithub.io/articles/concurrent-training-interference-2026-meta-analysis/
- Detraining: Endurance Declines Faster Than Strength: https://aifithub.io/articles/detraining-how-fast-you-lose-by-training-age/
- Female Athlete Physiology: Where Formulas Fail: https://aifithub.io/articles/female-athlete-physiology-where-formulas-fail/
- Hybrid Athlete Macro Splits: https://aifithub.io/articles/hybrid-athlete-macro-split-math/
- Junk Volume in Hypertrophy: https://aifithub.io/articles/junk-volume-hypertrophy-from-your-log/
- Marathon Pace and Elevation Adjustments: https://aifithub.io/articles/marathon-pace-elevation-validated/
- Polarized vs Threshold Training: 2026 Evidence Review: https://aifithub.io/articles/polarized-vs-threshold-training-2026-systematic-review/
- Travel and Jet Lag for Athletes: The Recovery Math: https://aifithub.io/articles/travel-jet-lag-athletes-math/
- Velocity-Based Training: 1RM From Bar Speed: https://aifithub.io/articles/velocity-based-training-1rm-from-bar-speed/
- Why You Stalled at a 1.5x Bodyweight Squat: https://aifithub.io/articles/why-stalled-1.5x-bw-squat/
- 4 Week Mini Cut: The Math That Resets Body Fat Between Bulks: https://aifithub.io/articles/mini-cuts-4-week-math-bulks/
- Aggressive Bulk vs Lean Bulk: The Math (Garthe RCT): https://aifithub.io/articles/lean-bulk-vs-aggressive-bulk-math/
- Block vs DUP Periodization: The Hypertrophy Math: https://aifithub.io/articles/block-vs-dup-periodization-hypertrophy-math/
- Body Recomposition for Lifters: The Calorie Math: https://aifithub.io/articles/body-recomposition-lifters-calorie-math/
- Carb Periodization for Hybrid Athletes: https://aifithub.io/articles/carb-periodization-hybrid-athletes-math/
- Heat Acclimatization: Sodium and Plasma Volume: https://aifithub.io/articles/heat-acclimatization-sodium-plasma-volume/
- Marathon Taper: Reduce Volume 41-60%, Keep Intensity: https://aifithub.io/articles/marathon-taper-volume-reduction-curve/
- Maximum Natural FFMI: The Confounders That Bend the Limit: https://aifithub.io/articles/ffmi-natty-boundaries-data-shows/
- Powerlifting Peaking Math: https://aifithub.io/articles/powerlifting-peaking-smolov-sheiko-texas/
- Pre-Fatigue Training: When the Math Says It Helps: https://aifithub.io/articles/pre-fatigue-training-when-math-supports-it/
- Race-Time Prediction: VDOT vs Riegel Failure Modes: https://aifithub.io/articles/race-time-prediction-vdot-riegel-failure-modes/
- Recovery Math: How HRV, Sleep, and RPE Predict: https://aifithub.io/articles/recovery-math-hrv-sleep-rpe-prediction/
- RPE Programming: Why the Math Beats the Coach: https://aifithub.io/articles/rpe-based-programming-math-vs-coach/
- Sleep Debt vs Training Stress: The Interaction: https://aifithub.io/articles/sleep-debt-training-stress-interaction/
- Zone 2 Training Methods and Limits: Lactate, HR, Talk Test: https://aifithub.io/articles/zone-2-training-literature-methods-limits/
- Bod Pod vs DEXA vs Calipers: Body Fat Accuracy: https://aifithub.io/articles/body-composition-for-athletes/
- DOTS vs Wilks vs GL Points: Which Score to Use: https://aifithub.io/articles/dots-vs-wilks-vs-gl/
- Evidence-Based Hypertrophy & Powerlifting Programming 2026: https://aifithub.io/articles/evidence-based-programming-2026/
- FFMI 25 Natural Limit: The Kouri 1995 Study, Reappraised: https://aifithub.io/articles/natural-muscular-potential-ffmi/
- Heart-Rate Zones: Methods Compared: https://aifithub.io/articles/heart-rate-zones-methods-compared/
- Morton 2018 Protein: 1.6 g/kg, 2.2 Upper 95% CI: https://aifithub.io/articles/protein-for-lifters-2026/
- Riegel Formula Exponent 1.06 (Original 1981 Paper): https://aifithub.io/articles/race-time-prediction-riegel-limits/
- TDEE Formulas Compared: Mifflin vs Harris vs Katch: https://aifithub.io/articles/tdee-formulas-compared/
- VO2 Max Field Tests: Which Derivation to Trust: https://aifithub.io/articles/vo2-max-field-tests/
- Zone 2 Training: What the Literature Says: https://aifithub.io/articles/zone-2-training-what-the-literature-says/

### Focused how-tos and comparisons (142)
- COROS APEX 4 vs Garmin fenix 8 2026: https://aifithub.io/articles/coros-apex-4-vs-garmin-fenix-8-2026/
- Garmin Forerunner 570 vs 265 vs Coros Pace Pro 2026: https://aifithub.io/articles/garmin-forerunner-570-vs-265-vs-coros-pace-pro-2026/
- How Many Sets Per Week for Hypertrophy? Dose-Response 2026: https://aifithub.io/articles/sets-per-week-hypertrophy-dose-response/
- Oura Ring 5 vs WHOOP 5.0 vs Galaxy Ring 2026: Compared: https://aifithub.io/articles/oura-ring-5-vs-whoop-5-vs-galaxy-ring-2026/
- Strava + Runna Bundle vs TrainingPeaks (2026): https://aifithub.io/articles/strava-runna-bundle-vs-trainingpeaks-2026/
- Best Macro Tracking Apps 2026: MacroFactor vs Cronometer vs MyFitnessPal: https://aifithub.io/articles/best-macro-tracking-apps-macrofactor-vs-cronometer-vs-myfitnesspal-2026/
- Garmin vs COROS vs Polar Running Watch 2026: Marathon Pick: https://aifithub.io/articles/garmin-vs-coros-vs-polar-running-watch-2026/
- Smart Scale Body-Fat Accuracy 2026: Withings vs Renpho vs Eufy: https://aifithub.io/articles/smart-scale-body-fat-accuracy-withings-vs-renpho-vs-eufy-2026/
- Whoop vs Oura vs Garmin 2026: HRV & Recovery Accuracy: https://aifithub.io/articles/whoop-vs-oura-vs-garmin-hrv-recovery-accuracy-2026/
- Apple Watch Ultra 3 vs Garmin Fenix 8 2026: Battery, Price: https://aifithub.io/articles/apple-watch-ultra-3-vs-garmin-fenix-8-2026/
- Apple Watch Ultra 3 vs Garmin Forerunner 970 2026: https://aifithub.io/articles/apple-watch-ultra-3-vs-garmin-forerunner-970-2026/
- Are Smart Scales Accurate in 2026? Weight vs Body Fat: https://aifithub.io/articles/are-smart-scales-accurate-2026/
- Best Chest Strap Heart Rate Monitors 2026: Top Picks: https://aifithub.io/articles/best-chest-strap-heart-rate-monitors-2026/
- Best Recovery Trackers 2026: WHOOP vs Oura vs Garmin: https://aifithub.io/articles/best-recovery-trackers-2026/
- Best Running Watches 2026: Picks by Tier and Budget: https://aifithub.io/articles/best-running-watches-2026/
- Best Smart Rings 2026: Oura vs Ultrahuman and the Picks: https://aifithub.io/articles/best-smart-rings-2026/
- COROS PACE 4 vs Garmin Forerunner 165 2026: GPS, Battery: https://aifithub.io/articles/coros-pace-4-vs-garmin-forerunner-165-2026/
- COROS PACE Pro vs Garmin Forerunner 265 2026: Maps, Battery: https://aifithub.io/articles/coros-pace-pro-vs-garmin-forerunner-265-2026/
- Eight Sleep Pod 5 vs Oura Ring 4 2026: Sleep Compared: https://aifithub.io/articles/eight-sleep-pod-5-vs-oura-ring-4-2026/
- Garmin Edge 1050 vs 540 2026: Touchscreen, Battery, Price: https://aifithub.io/articles/garmin-edge-1050-vs-540-2026/
- Garmin fenix 8 vs Enduro 3 2026: Battery, Price, Specs: https://aifithub.io/articles/garmin-fenix-8-vs-enduro-3-2026/
- Garmin Forerunner 970 vs 965 2026: ECG, Battery, Price: https://aifithub.io/articles/garmin-forerunner-970-vs-965-2026/
- Garmin Forerunner 970 vs COROS PACE 4 2026: Battery, Maps: https://aifithub.io/articles/garmin-forerunner-970-vs-coros-pace-4-2026/
- Is Apple Watch Calorie Count Accurate? (2026 Evidence): https://aifithub.io/articles/is-apple-watch-calorie-count-accurate-2026/
- Is Garmin Calorie Count Accurate? (2026 Evidence): https://aifithub.io/articles/is-garmin-calorie-count-accurate-2026/
- Is the Oura Ring Accurate in 2026? What the Studies Show: https://aifithub.io/articles/is-oura-ring-accurate-2026/
- Is WHOOP Accurate in 2026? What the Studies Show: https://aifithub.io/articles/is-whoop-accurate-2026/
- Optical Wrist vs Chest Strap HR: What Studies Show 2026: https://aifithub.io/articles/optical-wrist-vs-chest-strap-hr-what-studies-show-2026/
- Polar H10 vs Garmin HRM 600 2026: Accuracy, Features: https://aifithub.io/articles/polar-h10-vs-garmin-hrm-600-2026/
- Recovery & Readiness Scores: What the Evidence Says 2026: https://aifithub.io/articles/recovery-readiness-scores-what-evidence-says-2026/
- Ultrahuman Ring PRO vs Oura Ring 4 2026: Subscription, Battery: https://aifithub.io/articles/ultrahuman-ring-pro-vs-oura-ring-4-2026/
- Which Sleep-Stage Metrics Are Validated 2026: https://aifithub.io/articles/which-sleep-stage-metrics-are-validated-2026/
- WHOOP 5 vs Garmin CIRQA 2026: What We Actually Know: https://aifithub.io/articles/whoop-5-vs-garmin-cirqa-2026/
- WHOOP 5 vs Ultrahuman Ring PRO 2026: Cost, Battery: https://aifithub.io/articles/whoop-5-vs-ultrahuman-ring-pro-2026/
- Zwift vs MyWhoosh 2026: Free vs Paid Indoor Cycling: https://aifithub.io/articles/zwift-vs-mywhoosh-2026/
- Amazfit vs Garmin 2026: Accuracy, Battery and Value Compared: https://aifithub.io/articles/amazfit-vs-garmin-2026/
- Best Cycling Computers 2026: Garmin Edge vs Wahoo ELEMNT: https://aifithub.io/articles/best-cycling-computers-2026/
- Best Fitness Trackers 2026: Garmin, Whoop, Oura, Apple, Fitbit: https://aifithub.io/articles/best-fitness-trackers-2026/
- Best Free 1RM & Strength Calculators 2026: Honest Guide: https://aifithub.io/articles/best-free-1rm-strength-calculators-2026/
- Best Free TDEE & Calorie Calculators 2026: Honest vs the Apps: https://aifithub.io/articles/best-free-tdee-calorie-calculators-2026/
- Best Heart Rate Monitors 2026: Chest Straps vs Armbands: https://aifithub.io/articles/best-heart-rate-monitors-2026/
- Best Running App 2026: Runna vs Nike vs Garmin Coach: https://aifithub.io/articles/best-running-app-2026-runna-vs-nike-run-club-vs-garmin-coach/
- Best Sleep Trackers 2026: Oura, Whoop, Eight Sleep Compared: https://aifithub.io/articles/best-sleep-trackers-2026/
- Best Smart Scales 2026: Renpho, Eufy, Withings Compared: https://aifithub.io/articles/best-smart-scales-2026/
- Best Workout & Training Apps 2026: Hevy, Fitbod, RP, TrainerRoad: https://aifithub.io/articles/best-workout-training-apps-2026/
- Chest Strap vs Optical Heart Rate Accuracy 2026: The Gap: https://aifithub.io/articles/chest-strap-vs-optical-heart-rate-accuracy-2026/
- DEXA vs Smart Scale Body Fat Accuracy 2026: How Far Off: https://aifithub.io/articles/dexa-vs-smart-scale-body-fat-2026/
- Eight Sleep Pod vs Sleep Number 2026: Cost and Subscription: https://aifithub.io/articles/eight-sleep-pod-vs-sleep-number-2026/
- Fitbit vs Apple Watch 2026: Price, Subscription and Features: https://aifithub.io/articles/fitbit-vs-apple-watch-2026/
- Garmin Connect vs intervals.icu 2026: Free Training Analysis: https://aifithub.io/articles/garmin-connect-vs-intervals-icu-2026/
- Garmin Edge 540 vs 840 2026: What the $100 Touchscreen Buys: https://aifithub.io/articles/garmin-edge-540-vs-840-2026/
- Garmin vs Apple Watch for Running 2026: GPS, Battery, Cost: https://aifithub.io/articles/garmin-vs-apple-watch-for-running-2026/
- Garmin vs COROS 2026: Battery, GPS and Subscription Compared: https://aifithub.io/articles/garmin-vs-coros-2026/
- Hevy vs Strong vs Fitbod 2026: Pricing and Features Compared: https://aifithub.io/articles/hevy-vs-strong-vs-fitbod-2026/
- InBody vs DEXA Accuracy 2026: Which Body-Comp Scan to Trust: https://aifithub.io/articles/inbody-vs-dexa-body-composition-accuracy-2026/
- Is MyFitnessPal's TDEE Accurate in 2026?: https://aifithub.io/articles/is-myfitnesspal-tdee-accurate-2026/
- Lose It vs MyFitnessPal vs Lifesum 2026: Best Calorie App: https://aifithub.io/articles/lose-it-vs-myfitnesspal-vs-lifesum-2026/
- MacroFactor vs Cronometer 2026: Adaptive TDEE vs Micros: https://aifithub.io/articles/macrofactor-vs-cronometer-2026/
- MyFitnessPal vs Cronometer 2026: Micronutrients, Accuracy, Cost: https://aifithub.io/articles/myfitnesspal-vs-cronometer-2026/
- MyFitnessPal vs MacroFactor 2026: Adaptive TDEE, Accuracy, Cost: https://aifithub.io/articles/myfitnesspal-vs-macrofactor-2026/
- Oura Ring vs Apple Watch Sleep Tracking 2026: https://aifithub.io/articles/oura-ring-vs-apple-watch-sleep-2026/
- Pixel Watch vs Apple Watch 2026: Price, Fitness and Pairing: https://aifithub.io/articles/pixel-watch-vs-apple-watch-2026/
- Polar vs Garmin Heart Rate Accuracy 2026: H10 vs HRM-Pro Plus: https://aifithub.io/articles/polar-vs-garmin-heart-rate-accuracy-2026/
- RENPHO vs eufy Smart Scale 2026: Best Budget Body-Fat Scale: https://aifithub.io/articles/renpho-vs-eufy-smart-scale-2026/
- Renpho vs Withings Smart Scale 2026: Which to Buy: https://aifithub.io/articles/withings-body-vs-renpho-smart-scale-2026/
- RP Hypertrophy App vs Fitbod 2026: Which Strength App: https://aifithub.io/articles/rp-hypertrophy-app-vs-fitbod-2026/
- Runna Pricing 2026 vs Free Garmin Coach: Plans Compared: https://aifithub.io/articles/runna-vs-garmin-coach-2026/
- Skinfold Calipers vs BIA Scale vs DEXA: Accuracy 2026: https://aifithub.io/articles/skinfold-calipers-vs-bia-scale-vs-dexa-accuracy-2026/
- Strava vs Garmin Connect vs Intervals.icu 2026: https://aifithub.io/articles/strava-vs-garmin-connect-vs-intervals-icu-2026/
- Strava vs TrainingPeaks 2026: Prices & Plans Compared: https://aifithub.io/articles/strava-vs-trainingpeaks-2026/
- TrainerRoad vs Zwift vs Wahoo SYSTM 2026: Price and Focus: https://aifithub.io/articles/trainerroad-vs-zwift-vs-wahoo-systm-2026/
- Ultrahuman Ring vs Oura Ring 2026: Subscription and Accuracy: https://aifithub.io/articles/ultrahuman-ring-vs-oura-ring-2026/
- Wahoo ELEMNT vs Garmin Edge 2026: Bike Computers Compared: https://aifithub.io/articles/wahoo-elemnt-vs-garmin-edge-2026/
- Whoop vs Garmin for Recovery 2026: Do You Need Both?: https://aifithub.io/articles/whoop-vs-garmin-for-recovery-2026/
- Whoop vs Oura Ring: Two-Way Head-to-Head 2026: https://aifithub.io/articles/whoop-vs-oura-ring-2026/
- Whoop vs Oura vs Garmin: Cost & Subscriptions 2026: https://aifithub.io/articles/whoop-5-vs-oura-ring-4-vs-garmin-2026/
- 1500m Freestyle in 30 Minutes: Pace and SWOLF Walkthrough: https://aifithub.io/articles/swim-pace-1500m-freestyle-30-minutes/
- 16:8 Intermittent Fasting Starting at Noon: A Realistic Schedule: https://aifithub.io/articles/intermittent-fasting-16-8-12pm-first-meal/
- 20-Week Recomp: 84kg/24% to Target 18% Body Fat: https://aifithub.io/articles/body-recomposition-20-week-84kg-24pct-male/
- 3:15 Marathon Pace: Daniels VDOT Training Zones: https://aifithub.io/articles/running-paces-marathon-pr-3-15-mcmillan/
- 5/3/1 vs Smolov vs Sheiko: Which Plan Fits a Real Intermediate: https://aifithub.io/articles/five-three-one-vs-smolov-vs-sheiko-decision/
- Bench Press RPE 8 for 5 Reps: The Percentage Walkthrough: https://aifithub.io/articles/rpe-percentage-bench-press-rpe-8-five-reps/
- BMI vs FFMI vs Body Fat: A 178cm/80kg Male Through Three Lenses: https://aifithub.io/articles/bmi-vs-ffmi-vs-body-fat-178cm-male-80kg/
- Calorie Deficit: 85 kg to 75 kg in 20 Weeks at 2200 TDEE: https://aifithub.io/articles/calorie-deficit-85kg-to-75kg-20-week-plan/
- Concurrent Training Interference: 4 Lifts, 35km Running, 1 Rest Day: https://aifithub.io/articles/concurrent-training-4-lift-30km-run-interference/
- Cooper 12-Minute Test: 2400m for a 30-Year-Old Male: https://aifithub.io/articles/vo2-max-12-minute-cooper-2400m-male-30/
- Creatine Loading vs Maintenance for an 82kg Lifter: https://aifithub.io/articles/creatine-loading-vs-maintenance-82kg-lifter/
- Cycling FTP Zones: 250W at 75kg, 3.33 W/kg Walkthrough: https://aifithub.io/articles/cycling-ftp-zones-250w-75kg-rider/
- Deload Protocols: When the Math Says Stop and When It Says Tweak: https://aifithub.io/articles/deload-protocols-pragmatism-vs-protocol-methodology/
- Detraining Decay: 4 Weeks Off for a 3-Year Trained Lifter: https://aifithub.io/articles/detraining-decay-4-weeks-off-3-year-trained/
- DOTS vs Strength Standards: Two Lenses for the Same Lifter: https://aifithub.io/articles/dots-vs-strength-standards-amateur-lifter/
- DOTS, Wilks, GL: An 83kg/510kg Male Lifter Scored Three Ways: https://aifithub.io/articles/dots-83kg-male-500kg-total-vs-equipped/
- Epley, Brzycki, Lombardi, Lander: A Methodology Deep-Dive on 1RM Math: https://aifithub.io/articles/epley-brzycki-lombardi-lander-1rm-methodology/
- Female Athlete Formula Suite: A 30-Year-Old in Regular Cycle: https://aifithub.io/articles/female-athlete-suite-30-yr-luteal-phase-case/
- FFMI for the Intermediate Female Lifter: A 60kg/165cm/22% Walkthrough: https://aifithub.io/articles/ffmi-intermediate-female-lifter-case-study/
- From a 40-Minute 10K to a Half Marathon: A Riegel Walkthrough: https://aifithub.io/articles/race-time-predictor-track-10k-to-half-marathon/
- Heart-Rate Zones vs Zone 2 Tools: Two Maps of the Same Effort: https://aifithub.io/articles/heart-rate-zones-vs-zone-2-decision-frame/
- HRV Deload Trigger: A 7-Day Decline from Baseline 56 to Mean 50: https://aifithub.io/articles/hrv-deload-trigger-trend-decline-case/
- Hybrid Training Plan: 30km Running, 70/20/10 Intensity, Three Lifts: https://aifithub.io/articles/hybrid-training-30km-easy-tempo-mix-3-lifts/
- Ideal Weight vs BMI vs FFMI for a 178cm Male: Three Failure Modes: https://aifithub.io/articles/ideal-weight-vs-bmi-vs-ffmi-178cm-male/
- Junk Volume Detector: A 3-Week Stalling Squat Log: https://aifithub.io/articles/junk-volume-detector-squat-log-stagnation/
- LBM, FFMI, and Body Fat: A Decision Tree for Body Composition: https://aifithub.io/articles/lbm-vs-ffmi-vs-body-fat-decision-tree/
- Macro Cycling for an 80kg Male Recomp at 2500 kcal TDEE: https://aifithub.io/articles/macro-cycling-cutting-male-recomp-2500-tdee/
- Marathon Pace on a Net-Downhill Course: A Boston-Style Walkthrough: https://aifithub.io/articles/marathon-pace-elevation-net-downhill-boston-case/
- Marathon Sweat Rate: 70kg Runner, 2% Body Mass Loss in Warm Conditions: https://aifithub.io/articles/sweat-rate-marathon-warm-2-percent-loss/
- Marathon Taper from 90 km Peak: A 2-Week Volume Reduction Plan: https://aifithub.io/articles/race-week-taper-marathon-80km-peak-volume/
- Meet-Day Attempt Selection for a 300kg-Total Lifter at Moderate Confidence: https://aifithub.io/articles/meet-day-attempt-selection-300kg-total-male/
- Mifflin, Harris-Benedict, Cunningham: Resting Metabolism Methodology: https://aifithub.io/articles/mifflin-harris-benedict-cunningham-rmr-methodology/
- Muscle Gain Potential: A 178cm Narrow-Frame Male Case: https://aifithub.io/articles/muscle-gain-potential-narrow-frame-male-case/
- Polarized, Pyramidal, and Threshold Training: The Distribution Argument: https://aifithub.io/articles/polarized-vs-pyramidal-vs-threshold-methodology/
- Protein Intake vs Macro Calculators: Three Engines, One Lifter: https://aifithub.io/articles/protein-intake-vs-macro-calculators-cross-check/
- Riegel vs VDOT: Half-Marathon Time From a 40-Minute 10K: https://aifithub.io/articles/riegel-vs-vdot-half-marathon-from-10k/
- Running Pace vs Marathon Pace-Elevation: Flat vs Hilly Targets: https://aifithub.io/articles/running-pace-vs-marathon-pace-elevation-flat/
- Schoenfeld Volume Meta-Analyses and the Junk-Set Question: https://aifithub.io/articles/schoenfeld-volume-meta-junk-set-methodology/
- Sleep Debt, HRV, and Sleep Calculator: Cross-Checking Recovery Signals: https://aifithub.io/articles/sleep-debt-vs-hrv-vs-sleep-calc-cross-check/
- Smolov Base Cycle for a 150 kg Squat: 4-Week Walkthrough: https://aifithub.io/articles/smolov-base-cycle-150kg-squat-walkthrough/
- TDEE for a Sedentary Office Worker vs a Warehouse Picker: https://aifithub.io/articles/tdee-sedentary-office-worker-vs-warehouse-case/
- TDEE vs BMR vs Calories Burned: Which Number Drives Your Plan: https://aifithub.io/articles/tdee-vs-bmr-vs-calories-burned-decision-frame/
- The Minetti Curve: Why Downhill Running Is Cheap Then Brutal: https://aifithub.io/articles/minetti-energy-cost-uphill-downhill-methodology/
- Velocity-Based 1RM: 180 kg Squat at 0.50 m/s in Practice: https://aifithub.io/articles/velocity-based-1rm-squat-half-meter-second/
- VO2 Max Field Tests Compared: Cooper, Rockport, and Step Test: https://aifithub.io/articles/vo2-cooper-vs-rockport-vs-step-test-comparison/
- Walking, Treadmill, and Activity Engines: Where 300 kcal Hides: https://aifithub.io/articles/walking-vs-treadmill-vs-calories-burned-300kcal/
- Wendler 5/3/1 at TM 90%: A Cycle Walkthrough for a 420kg Total Lifter: https://aifithub.io/articles/wendler-531-tm-90-cycle-walkthrough-300kg-total/
- Where a 140kg Squat Puts an 80kg Male in the Strength Distribution: https://aifithub.io/articles/strength-percentile-squat-140kg-80kg-male/
- Wilks to IPF-GL to DOTS: The Coefficient Evolution Story: https://aifithub.io/articles/wilks-to-dots-coefficient-evolution-methodology/
- Zone 2 Heart Rate for a 30-Year-Old, RHR 50: Four Methods Compared: https://aifithub.io/articles/zone-2-hr-30-year-old-rhr-50-endurance-base/
- Mobility Assessment: How to Test and Improve It: https://aifithub.io/articles/how-to-assess-and-improve-mobility/
- How to Run a Mini Cut: https://aifithub.io/articles/how-to-do-a-mini-cut/
- How to Structure a Powerlifting Meet Day: https://aifithub.io/articles/how-to-structure-a-powerlifting-meet/
- How to Measure Body Fat at Home: https://aifithub.io/articles/how-to-measure-body-fat-at-home/
- TDEE for Athletes: Why Formulas Understate You: https://aifithub.io/articles/tdee-for-athletes/
- How to Use Heart Rate Zones: https://aifithub.io/articles/how-to-use-heart-rate-zones/
- How to Plan a Deload Week: https://aifithub.io/articles/how-to-plan-a-deload-week/
- How to Use RPE for Training: https://aifithub.io/articles/how-to-use-rpe-for-training/
- How to Estimate a 1RM Without Testing for One: https://aifithub.io/articles/how-to-calculate-one-rep-max-safely/
- How to Train for a 5k: https://aifithub.io/articles/how-to-train-for-a-5k/
- How to Improve Sleep for Recovery: https://aifithub.io/articles/how-to-improve-sleep-for-recovery/
- How to Build Muscle as a Beginner: https://aifithub.io/articles/how-to-build-muscle-as-a-beginner/
- How to Improve VO2 Max: https://aifithub.io/articles/how-to-improve-vo2-max/
- How to Eat Enough Protein: https://aifithub.io/articles/how-to-eat-enough-protein/
- How to Count Macros: https://aifithub.io/articles/how-to-count-macros/
- How to Break a Weight-Loss Plateau: https://aifithub.io/articles/how-to-break-a-weight-loss-plateau/

## Resources (247 total)

### Guides (43)
- How to Break a Calorie Deficit Plateau (5 Fixes): https://aifithub.io/guides/how-to-break-a-calorie-deficit-plateau/
- How to Calculate Macros for Bulking: A Complete Guide: https://aifithub.io/guides/how-to-calculate-macros-for-bulking/
- How to Measure Body Fat at Home: 4 Methods Compared: https://aifithub.io/guides/how-to-measure-body-fat-at-home/
- How to Use Your One-Rep Max for Training Programming: https://aifithub.io/guides/how-to-use-one-rep-max-for-programming/
- Intermittent Fasting for Beginners: How to Start: https://aifithub.io/guides/intermittent-fasting-for-beginners/
- Protein Timing: What the Research Actually Shows: https://aifithub.io/guides/protein-timing-myth-vs-reality/
- TDEE for Athletes: Why Standard Calculators Underestimate: https://aifithub.io/guides/tdee-for-athletes/
- Why Your TDEE Drops When You Diet (And What to Do About It): https://aifithub.io/guides/why-your-tdee-drops-when-you-diet/
- How to Avoid Overtraining: https://aifithub.io/guides/how-to-avoid-overtraining/
- How to Break a Weight Loss Plateau: https://aifithub.io/guides/how-to-break-a-weight-loss-plateau/
- How to Build a Home Workout Routine: https://aifithub.io/guides/how-to-build-a-home-workout-routine/
- How to Build a Strength Program from Scratch: https://aifithub.io/guides/how-to-build-a-strength-program/
- How to Build Grip Strength: https://aifithub.io/guides/how-to-build-grip-strength/
- How to Build Muscle as a Beginner: https://aifithub.io/guides/how-to-build-muscle-as-a-beginner/
- How to Calculate Macros for Cutting: https://aifithub.io/guides/how-to-calculate-macros-for-cutting/
- How to Calculate Your Ideal Weight: https://aifithub.io/guides/how-to-calculate-ideal-weight/
- How to Calculate Your One Rep Max: https://aifithub.io/guides/how-to-calculate-one-rep-max/
- How to Calculate Your TDEE for Any Fitness Goal: https://aifithub.io/guides/how-to-calculate-your-tdee/
- How to Count Macros: A Beginner's Guide: https://aifithub.io/guides/how-to-count-macros/
- How to Do a Body Recomposition: https://aifithub.io/guides/how-to-body-recomposition/
- How to Do a Mini Cut: https://aifithub.io/guides/how-to-do-a-mini-cut/
- How to Eat Enough Protein Every Day: https://aifithub.io/guides/how-to-eat-enough-protein/
- How to Eat for Recovery After Training: https://aifithub.io/guides/how-to-eat-for-recovery/
- How to Improve Mobility for Better Lifts: https://aifithub.io/guides/how-to-improve-mobility/
- How to Improve Sleep for Better Recovery: https://aifithub.io/guides/how-to-improve-sleep-for-recovery/
- How to Improve Your VO2 Max: https://aifithub.io/guides/how-to-improve-vo2-max/
- How to Manage Training Stress: https://aifithub.io/guides/how-to-manage-training-stress/
- How to Meal Prep for the Week: https://aifithub.io/guides/how-to-meal-prep-for-the-week/
- How to Plan a Deload Week: https://aifithub.io/guides/how-to-plan-a-deload-week/
- How to Prevent Common Training Injuries: https://aifithub.io/guides/how-to-prevent-common-injuries/
- How to Progressive Overload Properly: https://aifithub.io/guides/how-to-progressive-overload/
- How to Start a Calorie Deficit: https://aifithub.io/guides/how-to-start-a-calorie-deficit/
- How to Start Intermittent Fasting Safely: https://aifithub.io/guides/how-to-start-intermittent-fasting/
- How to Stay Hydrated During Exercise: https://aifithub.io/guides/how-to-stay-hydrated-during-exercise/
- How to Stretch Properly: A Practical Guide: https://aifithub.io/guides/how-to-stretch-properly/
- How to Track Body Fat Accurately: https://aifithub.io/guides/how-to-track-body-fat/
- How to Track Workout Progress Effectively: https://aifithub.io/guides/how-to-track-workout-progress/
- How to Train at Home Without Equipment: https://aifithub.io/guides/how-to-train-at-home-without-equipment/
- How to Train for a 5K: https://aifithub.io/guides/how-to-train-for-a-5k/
- How to Use Creatine: Dosing and Timing: https://aifithub.io/guides/how-to-use-creatine/
- How to Use Heart Rate Zones for Training: https://aifithub.io/guides/how-to-use-heart-rate-zones/
- How to Use RPE for Training: https://aifithub.io/guides/how-to-use-rpe-for-training/
- How to Warm Up for Deadlifts: https://aifithub.io/guides/how-to-warm-up-for-deadlifts/

### Checklists (25)
- TDEE Tracking Checklist: Your First 30 Days: https://aifithub.io/checklists/tdee-tracking-checklist/
- 5K Training Checklist: https://aifithub.io/checklists/5k-training-checklist/
- Body Recomposition Checklist: https://aifithub.io/checklists/body-recomp-checklist/
- Bulking Phase Checklist: https://aifithub.io/checklists/bulking-phase-checklist/
- Cutting Phase Checklist: https://aifithub.io/checklists/cutting-phase-checklist/
- Daily Hydration Checklist: https://aifithub.io/checklists/hydration-checklist/
- Daily Mobility Routine Checklist: https://aifithub.io/checklists/mobility-routine-checklist/
- Deload Week Checklist: https://aifithub.io/checklists/deload-week-checklist/
- Gym Beginner Checklist: https://aifithub.io/checklists/gym-beginner-checklist/
- Home Gym Setup Checklist: https://aifithub.io/checklists/home-gym-setup-checklist/
- Injury Prevention Checklist: https://aifithub.io/checklists/injury-prevention-checklist/
- Intermittent Fasting Start Checklist: https://aifithub.io/checklists/fasting-start-checklist/
- Marathon Training Checklist: https://aifithub.io/checklists/marathon-training-checklist/
- Post-Workout Recovery Checklist: https://aifithub.io/checklists/post-workout-recovery-checklist/
- Powerlifting Meet Day Checklist: https://aifithub.io/checklists/powerlifting-meet-checklist/
- Pre-Training Warm-Up Checklist: https://aifithub.io/checklists/warm-up-checklist/
- Pre-Workout Nutrition Checklist: https://aifithub.io/checklists/pre-workout-nutrition-checklist/
- Running Gear Checklist: https://aifithub.io/checklists/running-gear-checklist/
- Sleep Hygiene Checklist: https://aifithub.io/checklists/sleep-hygiene-checklist/
- Strength Training Program Checklist: https://aifithub.io/checklists/strength-training-program-checklist/
- Stretching Routine Checklist: https://aifithub.io/checklists/stretching-routine-checklist/
- Supplement Stack Checklist: https://aifithub.io/checklists/supplement-stack-checklist/
- Training Block Setup Checklist: https://aifithub.io/checklists/training-block-setup-checklist/
- Weekly Meal Prep Checklist: https://aifithub.io/checklists/meal-prep-weekly-checklist/
- Weight Loss Checklist: https://aifithub.io/checklists/weight-loss-checklist/

### Comparisons (34)
- 16:8 vs OMAD: Which Intermittent Fasting Protocol Is Better?: https://aifithub.io/compare/168-vs-omad-fasting/
- How Accurate Is the Navy Body Fat Calculator vs Calipers: https://aifithub.io/compare/navy-vs-caliper-body-fat/
- Is MyFitnessPal Accurate? TDEE Calculator vs MyFitnessPal: https://aifithub.io/compare/tdee-calculator-vs-myfitnesspal/
- Mifflin-St Jeor vs Harris-Benedict: Which Is More Accurate: https://aifithub.io/compare/mifflin-st-jeor-vs-harris-benedict/
- 5x5 vs Hypertrophy Program: https://aifithub.io/compare/5x5-vs-hypertrophy-program/
- BMI vs Body Fat Percentage: https://aifithub.io/compare/bmi-vs-body-fat-percentage/
- Calorie Counting vs Intuitive Eating Diet for Weight Loss: https://aifithub.io/compare/calorie-counting-vs-intuitive-eating/
- Compound vs Isolation Exercises: When Each Wins: https://aifithub.io/compare/compound-vs-isolation-exercises/
- Conventional vs Sumo Deadlift: https://aifithub.io/compare/conventional-vs-sumo-deadlift/
- Creatine vs No Creatine: https://aifithub.io/compare/creatine-vs-no-creatine/
- Cutting vs Bulking: When to Do Each: https://aifithub.io/compare/cutting-vs-bulking/
- Dumbbells vs Barbells: Which Builds More Muscle?: https://aifithub.io/compare/dumbbells-vs-barbells/
- Foam Rolling vs Stretching for Recovery: https://aifithub.io/compare/foam-rolling-vs-stretching/
- Free Weights vs Machines: https://aifithub.io/compare/free-weights-vs-machines/
- Full Body vs Split Routine: https://aifithub.io/compare/full-body-vs-split-routine/
- Gym vs Home Workouts: Cost, Gains and Convenience: https://aifithub.io/compare/gym-vs-home-workouts/
- High Bar vs Low Bar Squat: https://aifithub.io/compare/high-bar-vs-low-bar-squat/
- HIIT vs LISS: Which Cardio Is Better?: https://aifithub.io/compare/hiit-vs-liss/
- IIFYM vs Clean Eating: Which Wins for Fat Loss: https://aifithub.io/compare/iifym-vs-clean-eating/
- Intermittent Fasting vs Regular Meals: https://aifithub.io/compare/intermittent-fasting-vs-regular-meals/
- Linear vs Undulating Periodization: https://aifithub.io/compare/linear-vs-undulating-periodization/
- Low Carb vs Low Fat for Weight Loss: https://aifithub.io/compare/low-carb-vs-low-fat/
- Morning vs Evening Workouts: https://aifithub.io/compare/morning-vs-evening-workouts/
- PPL vs Upper/Lower Split: https://aifithub.io/compare/ppl-vs-upper-lower-split/
- Rest Days vs Active Recovery: https://aifithub.io/compare/rest-days-vs-active-recovery/
- Running vs Walking for Weight Loss: https://aifithub.io/compare/running-vs-walking-for-weight-loss/
- Static vs Dynamic Stretching: When to Use Each: https://aifithub.io/compare/static-vs-dynamic-stretching/
- Strength vs Hypertrophy Training: https://aifithub.io/compare/strength-vs-hypertrophy-training/
- Swimming vs Running for Fitness: https://aifithub.io/compare/swimming-vs-running/
- Treadmill vs Outdoor Running: https://aifithub.io/compare/treadmill-vs-outdoor-running/
- Whey Isolate vs Concentrate: Which Protein to Buy: https://aifithub.io/compare/isolate-vs-concentrate-protein/
- Whey vs Plant Protein: Which Builds Muscle Better?: https://aifithub.io/compare/whey-vs-plant-protein/
- Yoga vs Stretching: What's the Difference?: https://aifithub.io/compare/yoga-vs-stretching/
- Zone 2 vs Zone 5 Training: https://aifithub.io/compare/zone-2-vs-zone-5-training/

### Alternatives (3)
- Garmin Alternatives for Running Watches (2026): https://aifithub.io/alternatives/garmin-alternatives-running-watch-2026/
- Oura Ring Alternatives (2026): https://aifithub.io/alternatives/oura-ring-alternatives-2026/
- WHOOP Alternatives (2026): https://aifithub.io/alternatives/whoop-alternatives-2026/

### Learn (35)
- What Is Active Recovery? Simply Explained: https://aifithub.io/learn/active-recovery/
- What Is BMI? Simply Explained: https://aifithub.io/learn/bmi/
- What Is BMR? Simply Explained: https://aifithub.io/learn/bmr/
- What Is Body Fat Percentage? Definition & How It's Measured: https://aifithub.io/learn/body-fat-percentage/
- What Is Calorie Deficit? Simply Explained: https://aifithub.io/learn/calorie-deficit/
- What Is Compound Sets? Simply Explained: https://aifithub.io/learn/compound-sets/
- What Is Creatine? Simply Explained: https://aifithub.io/learn/creatine/
- What Is Deload? Simply Explained: https://aifithub.io/learn/deload/
- What Is DOMS? Simply Explained: https://aifithub.io/learn/doms/
- What Is Eccentric Training? Simply Explained: https://aifithub.io/learn/eccentric-training/
- What Is FFMI? Simply Explained: https://aifithub.io/learn/ffmi/
- What Is Glycogen? Simply Explained: https://aifithub.io/learn/glycogen/
- What Is HIIT? Simply Explained: https://aifithub.io/learn/hiit/
- What Is Hypertrophy? Simply Explained: https://aifithub.io/learn/hypertrophy/
- What Is Lactate Threshold? Meaning, Testing & Training: https://aifithub.io/learn/lactate-threshold/
- What Is Lean Body Mass? Simply Explained: https://aifithub.io/learn/lean-body-mass/
- What Is Macros? Simply Explained: https://aifithub.io/learn/macros/
- What Is Maximal Heart Rate? Simply Explained: https://aifithub.io/learn/maximal-heart-rate/
- What Is Metabolic Rate? Simply Explained: https://aifithub.io/learn/metabolic-rate/
- What Is Mobility? Simply Explained: https://aifithub.io/learn/mobility/
- What Is Muscle Protein Synthesis? Simply Explained: https://aifithub.io/learn/muscle-protein-synthesis/
- What Is Myofibrillar Hypertrophy? Simply Explained: https://aifithub.io/learn/myofibrillar-hypertrophy/
- What Is One Rep Max? Simply Explained: https://aifithub.io/learn/one-rep-max/
- What Is Periodization? Simply Explained: https://aifithub.io/learn/periodization/
- What Is Progressive Overload? Simply Explained: https://aifithub.io/learn/progressive-overload/
- What Is Range of Motion? Simply Explained: https://aifithub.io/learn/range-of-motion/
- What Is Rest-Pause Training? Simply Explained: https://aifithub.io/learn/rest-pause-training/
- What Is Reverse Dieting? Simply Explained: https://aifithub.io/learn/reverse-dieting/
- What Is RPE? Simply Explained: https://aifithub.io/learn/rpe/
- What Is TDEE? Total Daily Energy Expenditure Explained: https://aifithub.io/learn/tdee/
- What Is Tempo Training? Simply Explained: https://aifithub.io/learn/tempo-training/
- What Is Thermic Effect of Food? Simply Explained: https://aifithub.io/learn/thermic-effect-of-food/
- What Is Time Under Tension? Simply Explained: https://aifithub.io/learn/time-under-tension/
- What Is Training Frequency? Simply Explained: https://aifithub.io/learn/training-frequency/
- What Is VO2 Max? Simply Explained: https://aifithub.io/learn/vo2-max/

### Formulas (55)
- Hybrid Training Planner Formula: https://aifithub.io/formulas/hybrid-training-planner-formula/
- Concurrent Training Interference Formula: https://aifithub.io/formulas/concurrent-training-interference-formula/
- Cycling FTP Power Zones Formula: https://aifithub.io/formulas/cycling-power-ftp-zones-formula/
- Detraining Decay Formula: https://aifithub.io/formulas/detraining-decay-formula/
- Female Athlete Formula Suite: https://aifithub.io/formulas/female-athlete-formula/
- Flexibility Score Formula: https://aifithub.io/formulas/flexibility-score-formula/
- Food-to-Exercise Conversion Formula: https://aifithub.io/formulas/food-to-exercise-formula/
- HRV Deload Trigger Formula: https://aifithub.io/formulas/hrv-deload-trigger-formula/
- Hybrid Athlete Macro Split Formula: https://aifithub.io/formulas/hybrid-athlete-macro-split-formula/
- Intermittent Fasting Window Formula: https://aifithub.io/formulas/intermittent-fasting-window-formula/
- Junk Volume Threshold Formula: https://aifithub.io/formulas/junk-volume-formula/
- Katch-McArdle Formula: https://aifithub.io/formulas/katch-mcardle-formula/
- Macro Cycling Formula: https://aifithub.io/formulas/macro-cycling-formula/
- Marathon Pace Elevation Formula: https://aifithub.io/formulas/marathon-pace-elevation-formula/
- Marathon Sweat Rate + Electrolyte Formula: https://aifithub.io/formulas/sweat-rate-electrolyte-marathon-formula/
- Max Muscular Potential Formula (Natural Ceiling): https://aifithub.io/formulas/muscle-gain-potential-formula/
- Plate Loading Formula: https://aifithub.io/formulas/plate-loading-formula/
- Powerlifting Meet Day Attempt Selector Formula: https://aifithub.io/formulas/meet-day-attempt-selector-formula/
- Race-Week Taper Formula + Carb Loading (Burke): https://aifithub.io/formulas/race-week-taper-formula/
- Resting Heart Rate Formula + Interpretation: https://aifithub.io/formulas/resting-heart-rate-formula/
- Riegel Race Time Formula: https://aifithub.io/formulas/riegel-race-time-formula/
- RPE to Percentage Formula (Tuchscherer): https://aifithub.io/formulas/rpe-to-percentage-formula/
- Run Training Paces from a Race Time (Daniels VDOT): https://aifithub.io/formulas/run-training-paces-formula/
- Sleep Cycle Formula (90-Min): https://aifithub.io/formulas/sleep-calculator-formula/
- Sleep Debt Formula: https://aifithub.io/formulas/sleep-debt-formula/
- Smolov / Sheiko / Texas Method Formula: https://aifithub.io/formulas/smolov-sheiko-texas-formula/
- Strength Percentile Formula: https://aifithub.io/formulas/strength-percentile-formula/
- Treadmill to Outdoor Pace Conversion Formula: https://aifithub.io/formulas/treadmill-pace-converter-formula/
- Velocity-Based 1RM Formula: https://aifithub.io/formulas/velocity-based-1rm-formula/
- Wendler 5/3/1 Formula: https://aifithub.io/formulas/wendler-531-formula/
- BMI Formula: https://aifithub.io/formulas/bmi-formula/
- BMR Formula (Mifflin-St Jeor): https://aifithub.io/formulas/bmr-formula/
- Body Fat Percentage Formula (US Navy): https://aifithub.io/formulas/body-fat-formula/
- Body Recomposition Formula: https://aifithub.io/formulas/body-recomposition-formula/
- Calorie Deficit Formula: https://aifithub.io/formulas/calorie-deficit-formula/
- Calories Burned Formula (MET): https://aifithub.io/formulas/calories-burned-formula/
- Creatine Loading Formula: https://aifithub.io/formulas/creatine-loading-formula/
- Daily Water Intake Formula: https://aifithub.io/formulas/water-intake-formula/
- DOTS Score Formula: https://aifithub.io/formulas/dots-score-formula/
- FFMI Formula: Kouri-Adjusted Fat-Free Mass Index: https://aifithub.io/formulas/ffmi-formula/
- Heart Rate Zone Formula (Karvonen): https://aifithub.io/formulas/heart-rate-zone-formula/
- Ideal Weight Formula (Devine 1974): https://aifithub.io/formulas/ideal-weight-formula/
- Lean Body Mass Formula (Boer): https://aifithub.io/formulas/lean-body-mass-formula/
- Macronutrient Ratio Formula: https://aifithub.io/formulas/macro-ratio-formula/
- One-Rep Max Formula (Epley): https://aifithub.io/formulas/one-rep-max-formula/
- Progressive Overload Formula: https://aifithub.io/formulas/progressive-overload-formula/
- Protein Intake Formula: https://aifithub.io/formulas/protein-intake-formula/
- Running Pace Formula: Riegel & VDOT Race Pace Conversion: https://aifithub.io/formulas/running-pace-formula/
- Sweat Rate Formula: https://aifithub.io/formulas/sweat-rate-formula/
- Swim Pace Formula: https://aifithub.io/formulas/swim-pace-formula/
- TDEE Formula: https://aifithub.io/formulas/tdee-formula/
- VO₂ Max Formula (Cooper Test): https://aifithub.io/formulas/vo2-max-formula/
- Waist-to-Hip Ratio Formula: https://aifithub.io/formulas/waist-to-hip-ratio-formula/
- Walking Calorie Formula: https://aifithub.io/formulas/walking-calorie-formula/
- Workout Volume Formula: https://aifithub.io/formulas/workout-volume-formula/

### Examples (29)
- BMI Examples: https://aifithub.io/examples/bmi-examples/
- Bmr Examples: https://aifithub.io/examples/bmr-examples/
- Body Fat Examples: https://aifithub.io/examples/body-fat-examples/
- Body Recomposition Examples: https://aifithub.io/examples/body-recomposition-examples/
- Calorie Deficit Examples: https://aifithub.io/examples/calorie-deficit-examples/
- Calories Burned Examples: https://aifithub.io/examples/calories-burned-examples/
- Creatine Dosage Examples: https://aifithub.io/examples/creatine-dosage-examples/
- Dots Score Examples: https://aifithub.io/examples/dots-score-examples/
- FFMI Examples: https://aifithub.io/examples/ffmi-examples/
- Flexibility Score Examples: https://aifithub.io/examples/flexibility-score-examples/
- Heart Rate Zone Examples: https://aifithub.io/examples/heart-rate-zone-examples/
- Ideal Weight Examples: https://aifithub.io/examples/ideal-weight-examples/
- Intermittent Fasting Examples: https://aifithub.io/examples/intermittent-fasting-examples/
- Lean Body Mass Examples: https://aifithub.io/examples/lean-body-mass-examples/
- Macro Calculator Examples: https://aifithub.io/examples/macro-calculator-examples/
- One Rep Max Examples: https://aifithub.io/examples/one-rep-max-examples/
- Progressive Overload Examples: https://aifithub.io/examples/progressive-overload-examples/
- Protein Intake Examples: https://aifithub.io/examples/protein-intake-examples/
- Run Training Paces Examples: https://aifithub.io/examples/run-training-paces-examples/
- Running Pace Examples: https://aifithub.io/examples/running-pace-examples/
- Sleep Calculator Examples: https://aifithub.io/examples/sleep-calculator-examples/
- Strength Standards Examples: https://aifithub.io/examples/strength-standards-examples/
- Sweat Rate Examples: https://aifithub.io/examples/sweat-rate-examples/
- Swim Pace Examples: https://aifithub.io/examples/swim-pace-examples/
- TDEE Examples: https://aifithub.io/examples/tdee-examples/
- VO2 Max Examples: https://aifithub.io/examples/vo2-max-examples/
- Walking Calorie Examples: https://aifithub.io/examples/walking-calorie-examples/
- Water Intake Examples: https://aifithub.io/examples/water-intake-examples/
- Workout Volume Examples: https://aifithub.io/examples/workout-volume-examples/

### Statistics (23)
- Average TDEE by Age, Sex, and Activity Level: https://aifithub.io/statistics/tdee-statistics/
- Calorie Deficit Statistics: Fat Loss by the Numbers: https://aifithub.io/statistics/calorie-deficit-statistics/
- One-Rep Max Statistics: Strength Standards by Lift: https://aifithub.io/statistics/one-rep-max-statistics/
- Body Composition Statistics: Body Fat & Lean Mass Norms: https://aifithub.io/statistics/body-composition-statistics/
- Creatine Statistics: Effects on Strength, Power & Health: https://aifithub.io/statistics/creatine-statistics/
- Fitness App Statistics: Adoption, Adherence & Outcomes: https://aifithub.io/statistics/fitness-app-statistics/
- Flexibility Statistics: Norms, Methods & Effects: https://aifithub.io/statistics/flexibility-statistics/
- Gym Membership Statistics: US Trends and Demographics: https://aifithub.io/statistics/gym-membership-statistics/
- Home Gym Statistics: Adoption, Outcomes, & Equipment: https://aifithub.io/statistics/home-gym-statistics/
- Hydration Statistics: Daily Needs and Performance Impact: https://aifithub.io/statistics/hydration-statistics/
- Intermittent Fasting Statistics: Outcomes & Effects: https://aifithub.io/statistics/intermittent-fasting-statistics/
- Marathon Statistics: Finishing Times, Demographics & Records: https://aifithub.io/statistics/marathon-statistics/
- Meal Prep Statistics: Cooking & Adherence Outcomes: https://aifithub.io/statistics/meal-prep-statistics/
- Mobility & Injury Statistics: Risk Factors and Outcomes: https://aifithub.io/statistics/mobility-injury-statistics/
- Obesity Statistics: Prevalence, Health Risks, and Trends: https://aifithub.io/statistics/obesity-statistics/
- Overtraining Statistics: Symptoms, Recovery, & Prevalence: https://aifithub.io/statistics/overtraining-statistics/
- Periodization Statistics: Block, Linear & Undulating Models: https://aifithub.io/statistics/periodization-statistics/
- Protein Intake Statistics: Daily Requirements & Effects: https://aifithub.io/statistics/protein-intake-statistics/
- Running Statistics: Mortality, Performance, & Injury Data: https://aifithub.io/statistics/running-statistics/
- Sleep Statistics: Performance, Recovery, and Health Data: https://aifithub.io/statistics/sleep-statistics/
- Strength Training Statistics: Health & Mortality Data: https://aifithub.io/statistics/strength-training-statistics/
- Supplement Industry Statistics: Use, Efficacy, & Safety: https://aifithub.io/statistics/supplement-industry-statistics/
- Weight Loss Statistics: Real-World Outcomes by the Numbers: https://aifithub.io/statistics/weight-loss-statistics/

## Network
> Sister properties of one network — same conventions, same agent surfaces.
- aidevhub.io — AI developer tools hub: https://aidevhub.io (agent surface: /llms.txt, /agent-tools.json, HTTP API)
- aifinhub.io — AI-in-markets tools + research: https://aifinhub.io (agent surface: /llms.txt, /engines/manifest.json, /for-agents/)
- aifithub.io — evidence-based fitness calculators: https://aifithub.io (agent surface: /llms.txt, /engines/manifest.json, /for-agents/)
- aibizhub.io — AI solopreneur business tools: https://aibizhub.io (agent surface: /llms.txt, /engines/manifest.json, /for-agents/)
- orbyd.app — continuous market intelligence: https://orbyd.app (agent surface: /llms.txt, /now.json, /for-agents/)