Rest Period Calculator

How It Works

Rest periods between sets directly affect your training outcome. For strength (1-5 reps at 85%+ 1RM), research supports 3-5 minutes of rest to fully replenish the phosphocreatine system that powers heavy lifts. For hypertrophy (6-12 reps), 2-3 minutes allows sufficient recovery while maintaining the metabolic stress that drives muscle growth — a 2016 study by Schoenfeld et al. found that longer rest (3 min) led to greater hypertrophy and strength gains than shorter rest (1 min). For muscular endurance, 30-60 seconds keeps metabolic stress high. For power movements, 3-5 minutes ensures explosive quality on each rep. Compound exercises like squats and deadlifts require longer rest than isolation movements like curls because they recruit more muscle mass and tax the central nervous system more heavily.