Loading...
Loading...
Free Tool
Nail your rest periods between sets. Pick a preset, set a custom time, and let the timer tell you when it's time to go again.
Tap any row to set the timer to that rest period.
When you lift, your muscles burn through adenosine triphosphate (ATP) — the fuel for every rep. Rest is when your body replenishes that ATP through the phosphocreatine system. Cut your rest too short and you start the next set under-fuelled. Wait too long and you lose the metabolic stress that drives muscle growth.
After a maximal effort, roughly 50% of your phosphocreatine stores recover within 30 seconds, and around 85% by the 90-second mark. Full recovery takes 3–5 minutes. This is why strength work (heavy loads, low reps) demands longer rest — you need near-complete ATP regeneration to hit true maximal force again.
Strength: Longer rests (3–5 min) allow full phosphocreatine recovery so you can maintain peak force output across sets. The goal is performance per rep, not fatigue.
Hypertrophy: Moderate rests (60–90 sec) keep metabolic stress elevated — the pump, the burn, the hormonal response — while still recovering enough to hit meaningful volume.
Endurance: Short rests (30–60 sec) train your aerobic and lactic systems to clear fatigue quickly. The challenge is sustaining output under incomplete recovery.
These are guidelines, not rules. A heavy compound movement like a deadlift demands more recovery than a bicep curl at the same rep range. Listen to your body — if your form is breaking down, rest longer. If you feel fully recovered early, get back to work.
The Forge logs your workouts, tracks your rest habits, and helps your coach build programs around how you actually train.
Sign up free