How long should you rest between sets? It depends on the lift

Rest 2 to 3 minutes or more between sets of big compound lifts — squats, presses, deadlifts, rows. 1 to 2 minutes is fine for isolation work — curls, lateral raises, leg extensions. When in doubt, rest longer.

That’s the answer. What’s worth understanding is why the once-universal “60 seconds between sets” advice got it backwards.

What rest actually buys you

A set’s stimulus depends on how much work you do at meaningful effort. Rest exists to restock the fuel for that work — and the restocking takes minutes, not seconds.

Cut the rest short and your 8-rep squat set becomes a 5-rep set at the same weight. Across a session, short rest quietly deletes reps — and since volume-at-effort is what drives growth, resting less can literally mean training less while feeling like you trained more. Studies comparing longer versus shorter rest at matched effort keep finding the same direction: longer rest, more total reps, more growth. The mechanism is that boring.

Where the 60-second advice came from

Short rest produces more burn, more pump and more sweat per minute — everything that feels productive. It also came from hypertrophy traditions built around metabolic stress, and from circuit-style programs whose real goal is conditioning. None of that transfers to the person trying to add 2.5 kg to their press using double progression: that person needs every rep they can get, and rep one of getting them is being recovered enough to perform them.

The “short rest burns more fat” version is even weaker. The extra calories from resting 60 versus 180 seconds are trivial against a week’s intake — fat loss is decided by the deficit, as laid out in cardio vs weights for fat loss, not by how much you panted between sets of curls.

Practical numbers by lift type

• Heavy compound, low reps (squat/dead/press ≤6 reps): 3–5 minutes. Yes, really. Watch a strong person train and time them.
• Compound, moderate reps (6–12): 2–3 minutes.
• Isolation (curls, raises, pushdowns): 60–90 seconds — small muscles restock fast, and these sets are cheap.
• Supersets of non-competing exercises (curls + calf raises, rows + lateral raises): the honest time-saver. Each muscle rests while the other works, so density rises without any set getting worse.

The test for “rested enough”: can you match or beat last set’s reps at target effort? If reps are collapsing set to set — 10, 7, 5 — you’re not more fatigued in a productive way, you’re just measuring your incomplete recovery.

Rest is where sessions go to die

Here’s the practical failure mode, and it’s the opposite one: rest that says “2 minutes” and delivers 6, because the phone came out. A 5-exercise, 4-set session at a disciplined 2:30 fits inside an hour. The same session at phone-rest sprawls past 90 minutes, and 90-minute sessions are the ones that stop happening in week three — consistency is the whole ballgame.

So the skill isn’t “rest less” or “rest more”. It’s making rest deliberate: long enough to restock, timed so it can’t sprawl.

That’s why Momentum’s rest timer runs as a full-screen countdown that starts when you log the set and buzzes when it’s time — on your phone, or on your watch with the phone left in the locker. The timer is the difference between 2:30 by design and 6:00 by Instagram; the logged set on the other side of it is what makes the next session’s numbers mean something.

The one-line version

Rest long enough that the next set is worth doing, short enough that the session ends. For big lifts that’s 2–3+ minutes, for small ones about half that — and a timer, because nobody’s sense of “about two minutes” survives contact with a phone.