Strength
As of 2026-04-24
How Meet Day Attempt Selector works
Methodology for the Meet Day Attempt Selector: formulas, coefficients, data sources, assumptions, and known limitations.
Scope
Suggests powerlifting opener, second, and third attempts from 1RM and confidence level.
Formula
opener = 0.89–0.91 * expected_1RM. Second = 0.95–0.97 * expected_1RM. Third = 0.99–1.03 * expected_1RM.
Coefficients
| Parameter | Value | Note |
|---|---|---|
| Opener band | 89–91% of gym 1RM | |
| Second attempt band | 95–97% | |
| Third attempt band | 99–103% |
Data sources
- International Powerlifting Federation — Technical Rules Book (attempt selection and meet-day flow). — Three-attempt format and attempt-card rules for sanctioned meets.
- USA Powerlifting — Rule Book. — National-federation reference for meet-day attempt timing and selection.
- Helms ER, Cronin J, Storey A, Zourdos MC. Application of the repetitions in reserve-based rating of perceived exertion scale for resistance training. Strength Cond J. 2016;38(4):42-49. — Peer-reviewed RPE/RIR framework that informs the opener-to-third progression bands.
- Rippetoe M, Baker A. Practical Programming for Strength Training. 3rd ed. The Aasgaard Company, 2013. — Coaching textbook; source of the classic 90/96/102% attempt ladder used by many federations.
- Tuchscherer M. The Reactive Training Manual. Reactive Training Systems, 2008. — Source of the RPE-driven attempt-selection approach; self-published manual.
Assumptions
- Meet is fed-sanctioned with standard three-attempt format.
Approximation range
Openers at ~90% are chosen because >95% of lifters make them; third attempts are the risk attempts.
Limitations
- Cannot see the lifter's technique on the day; coach override is the final word.
Reproducibility
Squat 1RM 200 kg. Opener 180 kg (90%). Second 192.5 kg (96%). Third 202.5 kg (101%).
Change log
- 2026-04-24: methodology page first published.
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