For muscle growth, 90 seconds to 2 minutes is usually enough; above 90 seconds, a review found no visible difference [1]. For heavy compound lifts and maximal strength, rest periods over 2 minutes help [2, 3].
What do the studies show?
A review of 9 studies found a small edge for rest periods over 60 seconds; from 90 seconds on, no difference was visible [1]. Trained men built more strength and muscle thickness with 3 minutes of rest than with one [2].
For maximal strength, a review of 23 studies advises trained lifters to rest more than 2 minutes [3].
Why do compound lifts need longer rest?
Squats or bench presses work many muscles at once. With too little rest, you get fewer reps in the next set. Small exercises like lateral raises recover faster.
How long does Tarvo rest?
Tarvo plans rest by exercise type:
| Exercise | Muscle building | Strength |
|---|---|---|
| Compound | 2:30 | 3:00 |
| Medium | 2:00 | 2:00 |
| Isolation | 1:30 | 1:30 |
The timer starts as soon as you check off a set, on your iPhone, your Lock Screen and your Apple Watch. Adjust it with −15 s and +15 s, or skip it.
Sources
- [1]Singer, Wolf et al. (2024). Give it a rest: a systematic review with Bayesian meta-analysis on the effect of inter-set rest interval duration on muscle hypertrophy. Front Sports Act Living. doi 10.3389/fspor.2024.1429789Meta-analysis of 9 studies. A small edge above 60 seconds, no visible difference for growth above 90 seconds.
- [2]Schoenfeld et al. (2016). Longer Interset Rest Periods Enhance Muscle Strength and Hypertrophy in Resistance-Trained Men. J Strength Cond Res. doi 10.1519/jsc.0000000000001272Study of 21 trained men. Three minutes of rest built more strength and muscle thickness than one.
- [3]Grgic et al. (2018). Effects of Rest Interval Duration in Resistance Training on Measures of Muscular Strength. Sports Med. doi 10.1007/s40279-017-0788-xReview of 23 studies. More than 2 minutes of rest for maximal strength in trained lifters.
- [4]Viveiros et al. (2024). High-load and low-volume warm-up increases performance in a resistance training session. J Bodyw Mov Ther. doi 10.1016/j.jbmt.2024.08.004Study of 15 men. One heavy warm-up set led to more reps afterwards than light ones.