How long to rest between sets: what the studies found, lift by lift

The rest timer is the least glamorous setting in a training log and the one that decides session length. Five exercises, three sets each, three minutes between sets: that is about 40 minutes of rest. Halve the rest and the session loses about 20 minutes. Whether you lose anything else depends on the lift.

How long should you rest between sets?

Two rules sit under that table. Rest longer on the heavy lifts you do first, and on anything where your next set comes up well short of the last one. Rest less on small-muscle work, where it costs the fewest reps.

What does the research say about rest between sets?

The evidence has shifted from fixed prescriptions toward a looser picture: rest matters mainly through the reps it lets you keep.

The 2016 trial is the one most often quoted, and it is a good one: trained men, 3 sets of 8–12 reps on seven exercises, three full-body sessions a week, and rest as the only difference between groups. Its limits are its size and its length. Twenty-one people for eight weeks can show a difference; it cannot pin down a precise optimum.

The 2026 ACSM document is the newest and the most cautious. Where the 2009 stand gave specific minutes, the 2026 review gives no rest recommendation at all, because across the reviews it covered, rest length was not a significant factor for strength and the hypertrophy data were too thin to call (Currier et al., 2026).

Rest still matters, but less than effort and total volume, and mostly through its effect on volume.

Why does longer rest help, when it does?

Because it keeps reps on the later sets. Rest a minute between heavy sets and the second and third sets usually come up short of the first. Over weeks, that is less total work.

Longo et al. (2022) tested this directly. Twenty-eight people trained one leg at a time on knee extensions at 80% of one-rep max for ten weeks, with 1 or 3 minutes of rest and some protocols matched for total volume load. Quadriceps growth followed volume load: about 13% in the long-rest and volume-matched short-rest conditions, about 7% in the others. Strength rose similarly across all of them. The authors’ conclusion was that volume load, not the rest interval, drove the growth.

Singer and colleagues read their 2024 meta-analysis the same way: the benefit of resting past 60 seconds is probably mediated by smaller losses in volume load, and those losses level off as rest gets longer.

The practical version is simple. Rest long enough that the next set is not cut short. If you rest less, for time or preference, add a set to make up the reps.

How do you shorten a workout without losing much?

1. Cut rest on isolation and machine work first. Curls, raises and leg extensions recover quickly between sets. Keep the longer rest on the first heavy compound lift of the day.
2. Pair opposing exercises. A 2025 meta-analysis in Sports Medicine found supersets cut session time while keeping total reps and volume load similar, with similar long-term strength and hypertrophy. Opposing pairs such as a row with a bench press kept volume best. Pairs with similar movements, such as bench press and dips, reduced it, and supersets in general felt harder and caused more fatigue.
3. Rest less and add a set. Longo’s volume-matched conditions are the evidence that this works.

Should you time your rest at all?

I think so, for a reason that has little to do with physiology. Any progression rule that moves on reps assumes the reps are comparable from one session to the next. If Tuesday’s sets had two minutes between them and Friday’s had four because you were on your phone, the rep counts in your log are measuring the rest as much as the lifting. That matters most under double progression, where the weight only goes up once every set reaches the top of the rep range.

A timer keeps the variable fixed. It also stops rest creeping the other way on days when you are in a hurry.

This is training information, not medical advice. If you have a heart condition or high blood pressure, or get dizzy during heavy sets, ask a clinician how to approach heavy lifting and rest.

How LiftLog times rest

LiftLog starts the rest timer when you log a working set. Warm-up sets do not trigger it, and neither do timed cardio sets. The timer draws as a ring and has buttons to add or remove 15 seconds or skip.

The default is 90 seconds, with 30 seconds, 1, 2, 3 and 5 minutes available in settings. Each exercise in a program can carry its own rest, and you can change it for an exercise during a workout. The bundled example programs set rest per exercise along the lines of the table above: most heavy sets of five reps or fewer get 3 to 4 minutes, most sets of six to eleven get 1 to 2 minutes, and most high-rep work gets 45 to 60 seconds.

For supersets and giant sets there is no rest between the exercises in a group. The timer starts after the last exercise of the round.

The timer keeps counting if you lock the phone or switch apps. Sound, haptics and a rest-complete notification for when the phone is locked can each be turned off in settings. Programs and progression rules are covered in choosing a strength program you will finish.