PCr Rest Time Calculator
Estimate the rest interval required between sets to restore phosphocreatine using an exponential recovery model with a tunable time constant.
How to Use the PCr Rest Time Calculator
- Enter the recovery time constant τ (30 s default).
- Enter target PCr recovery percent (e.g. 95).
- Click Calculate.
Anwendungsfälle
- •Strength and conditioning programming.
- •Sprint interval training.
- •Sport-science study aid.
Formel
PCr(t) = PCr_max × (1 − exp(−t/τ)). Rearranged: t = −τ · ln(1 − target). Default τ ≈ 30 s.
Häufig gestellte Fragen
Why 30 seconds?
Studies with ³¹P-NMR put the PCr recovery half-time in trained muscle near 20–40 s, with τ ≈ 30 s as a working default.
When does τ change?
Fatigue, acidosis, low oxygen delivery and deconditioning all slow the constant; elite endurance athletes recover faster.
Medical disclaimer
Educational only. Not a substitute for clinical judgment — exercise prescription should be adjusted individually.