Heart Rate Zone Examples
Training at the wrong intensity is one of the most common reasons endurance programs stall. HR zones give intensity a precise number — not a feeling — so you can direct each session toward the specific adaptation you're after. These examples walk through how different athletes apply zone targets in practice.
Worked Examples
See the inputs and outcome together
Each scenario keeps the starting point, the outcome, and the actual lesson in one place so the page reads like a decision notebook, not a data dump.
- 1
Baseline 30-year-old
A 30-year-old with a resting heart rate of 60 bpm sets up Karvonen training zones.
Max heart rate estimates at 190 bpm with a 130 bpm reserve, putting the endurance Zone 2 at 138 to 151 bpm.
Age
30
Resting Hr
60
Method
Karvonen
The Karvonen method anchors zones to your reserve, not just max heart rate, so easy aerobic work lands in a tighter band. Keep most base mileage inside that Zone 2 window to build endurance without digging a recovery hole.
- 2
Older athlete
A 45-year-old with the same 60 bpm resting rate.
Max heart rate drops to 175 bpm with a 115 bpm reserve, shifting Zone 2 down to 129 to 141 bpm.
Age
45
Resting Hr
60
Method
Karvonen
Fifteen years lowers the whole zone ladder by more than ten beats. Borrowing a younger training partner's heart-rate targets is a common way to overcook every session, so recompute zones as you age.
- 3
Lower resting heart rate
The same 30-year-old, but fitter, with a resting rate of 50 bpm.
Max stays at 190 bpm but the reserve widens to 140 bpm, lifting Zone 2 to 134 to 148 bpm.
Age
30
Resting Hr
50
Method
Karvonen
A lower resting rate signals a stronger heart and widens your reserve, which nudges every zone upward. This is why improving fitness can make an old heart-rate target feel too easy over time.
- 4
Younger, higher resting rate
A 25-year-old new to training with a resting rate of 72 bpm.
Max estimates at 195 bpm with a 123 bpm reserve, placing Zone 2 at 146 to 158 bpm.
Age
25
Resting Hr
72
Method
Karvonen
Youth raises max heart rate, but the higher resting rate trims the reserve. Both inputs pull in opposite directions here, which is exactly why a personalised calculation beats the rough 220-minus-age rule of thumb.
Patterns
Try These Tools
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VO2 Max Estimator
Estimate aerobic capacity with the Cooper 12-minute run or Rockport 1-mile walk field tests.
Resting Heart Rate Calculator
Assess cardiovascular fitness from your resting heart rate — classification, cardio age, and improvement targets.
Zone 2 Heart Rate Calculator
Calculate your Zone 2 heart rate with Maffetone, Karvonen, % Max HR, and lactate threshold methods compared side by side.
Sources & References
- Target Heart Rates Chart — American Heart Association
- Heart Rate Training Zones: What Are They, and How Do You Use Them? — American Council on Exercise (ACE Fitness)
Related Content
Keep the topic connected
Heart Rate Zone Formula (Karvonen)
Heart rate zone formula (Karvonen): target_HR = (HRmax − HRrest) × intensity_pct + HRrest. HRmax ≈ 208 − 0.7·age (Tanaka).
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