How long should you rest between sets?

For most beginners, resting about 1 to 2 minutes between sets is enough. In the studies, muscle grew with rests from under a minute to over three minutes.^[1] Resting more than a minute gave a small edge for muscle growth over resting a minute or less. That edge is small enough that it may be zero.^[1] For strength, the studies disagree.

For muscle growth, 60 seconds is enough, and three minutes isn't required.^[1] The answer isn't obvious because gym advice often comes as a strict rule, such as 30 to 90 seconds for muscle. A 2024 review says that advice was built largely on short studies of hormone levels after a workout.^[1] It says the advice deserves a rethink.^[1]

In How often should you train each muscle? you spread your sets across the week. This article is about the minutes between those sets.

Why rest time matters

The rest between sets decides how many reps you can do on the next one. Rest too little, and your later sets come up short. In one study, men did four sets of squats and bench presses. They got fewer total reps done with 1 minute of rest than with 2 or 5.^[2]

Rest too long, and the session drags. Say a workout has 15 working sets (the hard sets, not the warm-ups). At 1.5 minutes of rest, that's about 22 minutes of resting. At 3 minutes, it's 45. Same lifts, more than 20 extra minutes on the bench.

What the research says

A few terms first. Hypertrophy means muscle growth: the muscle fibres get bigger. A meta-analysis pools the results of many studies on the same question into one estimate. A rest interval is the time between the end of one set and the start of the next.

Muscle grew at every rest length tested

Moderate evidence. In plain words: a little more than a minute might give you slightly more muscle than a rushed 45 seconds. You'd struggle to see the difference in the mirror, and it may not exist.

An earlier review of 6 studies came to the same view. Short and long rest both worked for muscle growth, with a possible edge for longer rest in people who already trained.^[3] Limited evidence. Those authors said there were too few studies to be sure.^[3]

Whether people trained to failure (the point where you can't do another rep) or stopped a rep or two short didn't change this picture.^[1] Limited evidence: only 3 studies trained to failure and 3 stopped short, so each side of that check is small. How hard a set should be has its own article: effort and reps in reserve.

The likely cost of short rest is fewer reps

The 2024 authors suggest short rest may cost muscle because you get fewer reps done.^[1] In the study above, 15 young men did 4 sets of squats and bench presses at the same weight. They did the most total reps with 5 minutes of rest, fewer with 2 minutes, and fewest with 1 minute.^[2] Limited evidence: it was one small study of single sessions.

A 10-week trial tested this directly.^[4] It used the knee extension, a machine that straightens the knee against a pad. Each of 28 people trained their two legs with a different setup for each leg. Legs that rested 1 minute grew about half as much as legs that rested 3 minutes (6.8% versus 13.1%). But when a 1-minute leg did more total work, matched to the 3-minute leg, it grew just as much (12.9%).^[4] And a 3-minute leg held to the smaller amount of work grew no more than a 1-minute leg (6.6%).^[4] Strength rose in every setup, with no difference between them.^[4]

Limited evidence: one small trial, one exercise. The authors concluded that the total work done mattered most for growth, whatever the rest.^[4] That fits what you read about counting hard sets per week.

For strength, the studies disagree

Mixed evidence. The studies disagree. Here's what each side found.

For longer rest:

• In an 8-week trial, 21 young men who already lifted rested either 1 or 3 minutes between sets.^[5] The 3-minute group gained more squat and bench press strength, and more thigh muscle.^[5] Limited evidence: one small trial in trained men.
• A review of 23 studies found that strength went up well even with rests under a minute.^[6] Its authors added that "it seems" trained lifters need more than 2 minutes to get the most strength. For people new to lifting, 60 to 120 seconds seemed enough.^[6] Limited evidence: the review didn't pool the numbers.

Against it:

• The American College of Sports Medicine (ACSM) 2026 position stand (an official summary by an expert panel) summarised 137 reviews. For strength, it drew on two reviews of rest, one being the 23-study review above. It found that resting under 1 minute or over 1 minute did not change strength gains.^[7] It also said there wasn't enough data to tell whether rest time changes muscle growth.^[7] Much of the evidence it pooled came from people new to training.^[7]

The two sides don't test quite the same thing. ACSM split rest at 1 minute. The review's advice for trained lifters is about rests over 2 minutes.^[6][7] For strength, the signal for longer rest comes mostly from people who already trained.^[5][6] If you're new, the same review suggested 60 to 120 seconds was enough.^[6]

Older ACSM guidance said to rest 2 to 3 minutes between sets.^[7] The 2026 update takes a different line. It says that shaping a program so people keep training matters more than meeting set numbers from past guidelines.^[7] Expert consensus. This is the panel's view, not a tested finding.

Supersets save time without costing work

A superset means doing two exercises back to back, then resting. A 2025 meta-analysis of 19 studies compared supersets with normal sets.^[8] Supersets cut session time by about 37%, with about the same number of reps and the same total work.^[8] Moderate evidence, mostly from single sessions.

How you pair them matters. Pairing exercises for opposite muscles (a push with a pull, say) kept the work up. Pairing two exercises for the same muscle cut the total work.^[8] Limited evidence: few studies in each group.

Over weeks, supersets built about the same strength and muscle as normal sets. Only three trials have tested this, though.^[8] Limited evidence. Supersets also feel harder: people rated their effort higher, and their blood lactate (a marker of hard muscle work) was higher.^[8] Moderate evidence.

Free weights are barbells and dumbbells. A multi-joint exercise moves several joints at once, like a press or a row. The authors of a 2021 review suggest that people new to lifting use machines rather than free weights when they superset multi-joint exercises. They say this could be safer and less demanding.^[9] Expert consensus. This is the authors' view, not a tested finding.

How to apply it

Rest exists so your next set can match or beat the last one, which is how progressive overload works. The steps below turn the research into a routine. The ranges come from the studies above. The rules for when to rest longer go further than any trial. This is coaching practice, not a tested finding.

1. Rest about 1 to 2 minutes as your default. The 2021 review authors give the same range for people new to lifting.^[9]
2. Take 2 to 3 minutes on heavy lifts when you need it. The 2021 review authors advise longer breaks for demanding lifts, such as heavy free-weight squats and presses. They advise shorter ones for small muscles like the biceps.^[9]
3. Watch your reps. If your reps fall by more than a couple from one set to the next at the same weight, rest longer next time.
4. Short rest is fine if you add work. If you rest a minute or less, add a set to make up the reps you lose. In one trial, legs resting 1 minute grew as much as legs resting 3 minutes once their total work was matched.^[4]
5. Short on time? Superset. Pair exercises for different muscles, like a chest press with a seated row.^[8] If you're new to lifting, use machines rather than barbells for the multi-joint lifts in a superset.^[9]
6. Time it. Use a timer instead of guessing, so your default rest stays your default.

A worked example

Say a 55 kg lifter does goblet squats with a 14 kg dumbbell for 3 sets of 10. (A goblet squat is a squat holding one dumbbell at the chest.)

• With 45 seconds of rest: 10, 8, 6. That's 24 reps.
• With 2 minutes of rest: 10, 10, 9. That's 29 reps.

The longer rest kept more reps in the later sets. If the lifter has to keep rest short, a fourth set at 45 seconds gets the reps back. (These numbers are illustrative, not from a study.)

What's practical versus optimal. If more than a minute of rest gives any extra muscle, it's small. A session you finish beats a longer one you skip. Coaching practice. If time is tight, short rest plus an extra set, or supersets, gets you close.

Common mistakes

Rushing rest to "spike hormones". The idea is that short rest builds more muscle by raising hormones after a workout. In a 12-week study of 49 trained men, the rise in hormones after a workout wasn't linked to muscle or strength gains.^[10] Rest long enough to keep your reps.

Scrolling for five minutes between every set. Without a timer, rest stretches to whenever you look up. But past about 90 seconds, the meta-analysis found no clear extra growth.^[1] Set a timer and start when it ends.

Thinking you must rest 3 minutes or waste the session. Muscle grew at every rest length tested.^[1] If you only have 45 minutes, shorter rest still works.

Supersetting two exercises for the same muscle. Two chest exercises back to back sounds efficient. It cuts the total work you can do.^[8] Pair a push with a pull instead.

How Gymbers fits

This article comes down to a default rest time and a clock to keep it. The Gymbers app runs a rest timer between sets. Programs in the app set a rest time per set. They also set a target rep range and a target RIR (reps in reserve: how many more reps you could have done). When the timer ends, start the next set.