How long should a strength workout be?
About 30 to 45 minutes. Five moves, two or three sets each, with a couple of minutes’ rest on the big lifts, takes about that long. Two of those a week is 60 to 90 minutes, which sits between the lowest-risk points of the two big studies of lifting and death.
A lot of people don’t start because they think a real workout is an hour and a half, plus the drive. Others go the other way and hope a seven-minute app routine will do it all. A strength workout that works is in between, and most of it is sitting on a bench waiting for the next set.
What we’d do
Plan 40 minutes. Warm up for five, lift for about 30, and stop. If a day only has 20 minutes, do the squat, the hinge, and a push and a pull back to back, and do the rest next time. Two sessions like that a week covers it, and you can spend anything left over walking.
Most of it is waiting
A strength workout is like a commute through town. Most of the time is spent sitting at red lights. Each set takes 30 to 45 seconds of actual lifting, and then you rest two minutes or so before the next one. The rest is what keeps the next set heavy. In an eight-week trial of 21 trained men, 3-minute rests built more strength and muscle than 1-minute rests.
The math
| Part | Sets | Time |
|---|---|---|
| Warm-up | A walk, then one light set | About 5 minutes |
| Five moves, 2 sets each (first week) | 10 | About 25 minutes |
| Five moves, 3 sets each | 15 | About 40 minutes |
| Lifting time inside that | 15 sets of 30 to 45 seconds | About 10 minutes |
Each set plus its rest comes to roughly two and a half to three minutes. Ten sets is about 25 minutes, fifteen is about 40. The strength protocol has six moves a session, so with 3 sets each it runs closer to 45 to 60 minutes, and a four-day plan with fewer moves a day comes back to about 45. If you want it shorter without cutting rest, pair a push with a pull and alternate them, so one rests while the other works.
What the big studies found
40 mina week, lowest risk
Across 16 cohort studies, the risk of death bottomed out near 40 minutes of lifting a week (Momma, 2022).
90 to 119minutes a week
The lowest-risk lifting group, 13% lower, in 147,374 US adults (Zhang, 2026).
2sessions a week
The minimum for strength in the 2026 ACSM review, and the US guideline.
In 2022, a review of 16 cohort studies found the lowest risk of death at about 40 minutes of muscle-strengthening a week, 17% lower than none, with risk still below none up to about 140 minutes. In 2026, a Harvard study of 147,374 US health professionals found the lowest risk at 90 to 119 minutes a week, 13% lower, and no extra benefit past two hours. Both studies counted people who chose their own exercise, so they show what went with a longer life rather than what caused it.
Two sessions of 30 to 45 minutes is 60 to 90 minutes a week. That’s past the first study’s low point and just short of the second’s, which makes it a good place to aim. The 2026 position stand from the American College of Sports Medicine, built on 137 reviews, found small doses of lifting gave substantial gains in strength and everyday function, and set two sessions a week as the floor for strength.
Past two hours
Past about two hours a week, the Harvard study found no extra benefit at all. If you have more time, a brisk walk does more for you on the numbers than a longer lifting session.
Score yourself before you start with the How strong am I? scorecard, and use how much is enough? to see where your weekly minutes of lifting and walking land.
4 sources
- Momma H and others, Muscle-strengthening activities are associated with lower risk and mortality in major non-communicable diseases, British Journal of Sports Medicine, 2022pmc.ncbi.nlm.nih.gov
- Zhang Y and others, Long-term resistance training with all-cause and cause-specific mortality, British Journal of Sports Medicine, 2026pmc.ncbi.nlm.nih.gov
- Currier BS and others, ACSM position stand on resistance training, Medicine and Science in Sports and Exercise, 2026pmc.ncbi.nlm.nih.gov
- Schoenfeld BJ and others, Longer interset rest periods enhance muscle strength and hypertrophy in resistance-trained men, Journal of Strength and Conditioning Research, 2016europepmc.org
