How many sets per muscle group per week do you need to build muscle?

How Many Sets per Muscle per Week to Build Muscle

Reviewed 2026-10-28 · 8 sources · By Anthony Falcone

The short answer: Count hard sets per muscle per week: sets that end fairly close to failure. Muscle growth rises with weekly sets, and a review of trained lifters settled on 12–20 sets per muscle a week, with little extra above 20 for most muscles measured. Strength needs far fewer sets, and how many days you spread them over matters little when the weekly total is the same.^3,2,1,7,4

Before you start

If you have heart disease, high blood pressure, a joint or back injury, or haven't exercised for a long time, talk to your doctor before you start lifting or raise your training volume.
This guide is for healthy adults. Children, teenagers and pregnancy are outside it; ask your doctor.

12–20 sets per muscle a week: the range a review of trained lifters suggests³
0.37% more muscle growth for each extra weekly set, in a meta-analysis of 15 studies¹
67 studies (2,058 people): more sets, more growth, with diminishing returns²
13 min sessions, 3 times a week, gave trained men the same strength gains as 68-minute ones⁷
25 studies: how often you train a muscle barely matters when weekly sets are equal⁴

What counts as a set

Research on muscle growth counts training volume as the number of sets per muscle group per week, and it counts sets taken close to failure, often called hard sets.³

Many exercises train more than one muscle. A meta-analysis of 67 studies compared ways of counting this and found its results fitted best when a set that works a muscle only indirectly counts as half a set: for example, the triceps, which help in pressing exercises but aren't the main mover.^2,3

More sets, more growth, up to a point

The first dose-response meta-analysis pooled 15 studies with 34 training groups. Each extra weekly set was linked to 0.37% more muscle growth, and within studies the higher-volume groups gained 3.9 percentage points more than the lower-volume groups.¹

It also grouped weekly sets per muscle into fewer than 5, 5–9 and 10 or more. The trend favoured more sets, but that comparison fell just short of statistical significance (p = 0.074). Only 2 of its 15 studies were done in people who already lifted, and it could only test volumes up to about 10 weekly sets.^1,7

The largest analysis so far, of 67 studies with 2,058 participants, found the same direction: muscle size and strength both kept rising as weekly sets rose. But the curve flattens, so each extra set adds less than the one before.²

12–20 sets for trained lifters, and when more helps

A systematic review of 7 randomised trials in people aged 18 to 35 with at least a year of lifting experience split weekly sets per muscle into low (under 12), moderate (12–20) and high (over 20). For the thighs and biceps, high volume grew no more muscle than moderate volume. For the triceps it did. The authors suggest 12–20 weekly sets per muscle as a standard target for young, trained men.³

In one 8-week trial, 34 trained men (45 started) did 1, 3 or 5 sets of each exercise, three times a week. That came to 6, 18 or 30 weekly sets for the upper body and 9, 27 or 45 for the legs. The 5-set group grew its biceps and thighs more than the 1-set group; for the triceps the groups didn't differ.⁷

The price is time. Sessions took about 13 minutes with 1 set, 40 with 3 sets and 68 with 5 sets.⁷

What you already do seems to matter. In one small study in the review, 16 trained people compared a fixed 20 sets with their own usual volume plus 20% (×1.2); 10 of them responded better to the individual plan. The review's authors call individualising volume a key factor, so build up from what you already do rather than jumping to a fixed number.³

Strength needs fewer sets

In the 8-week trial, squat and bench-press strength rose just as much with 1 set per exercise as with 3 or 5. The authors note that trained men gained marked strength from three 13-minute sessions a week.⁷

A meta-analysis of 9 strength studies (61 training groups) counted sets per exercise per week. Ten or more beat 5 or fewer, but by an effect the authors called trivial (effect size 0.18). For novice and intermediate men, 5 or fewer weekly sets per exercise gave smaller strength gains than 5–9.⁵

The 67-study analysis agrees: strength rises with volume too, but the returns shrink much sooner than they do for muscle size.²

How many days to spread them over

A meta-analysis of 25 studies found that when weekly volume was the same, training a muscle once, twice or three or more times a week made no meaningful difference to growth. The authors' conclusion: for a given number of sets, choose the frequency that suits you.⁴

Frequency is mostly a way to fit the sets in. The trained-lifter review suggests that training a muscle more often makes higher volumes easier to complete, and the 67-study analysis found that frequency mattered for strength, with diminishing returns, but its effect on muscle size was compatible with a negligible one.^3,2

Do the sets need to go to failure?

No. A meta-analysis of 15 studies found no advantage for sets taken to momentary muscular failure over sets stopped short of it (effect size 0.12, not significant). Across all definitions of failure the edge was trivial (0.19).⁶

Effort still matters, though. Most of the volume trials took their sets to failure, so the 12–20 range assumes sets that are genuinely hard. Count a set when it ends fairly close to failure.³

If you're new to lifting

The American College of Sports Medicine recommends that beginners lift loads they can manage for 8 to 12 repetitions, 2 to 3 days a week. For the most muscle growth it recommends higher-volume, multiple-set programmes.⁸

Most of the early volume studies were done in people new to lifting, and the review of trained lifters reads them as favouring more than 9 weekly sets per muscle. So about 10 hard sets per muscle a week is a sensible start, with sets added gradually from there as you adapt.^1,3,7

What to do with this

Count hard sets per muscle per week, and count a set that works the muscle only indirectly as half a set.^3,2
Start at about 10 hard sets per muscle a week; if you have trained for a year or more, 12–20 is the range with the best support.^1,3
Add sets gradually from what you do now. Above 20 sets, most muscles gained little more, and each extra set adds less.^3,2
If strength is your main goal, a few hard sets per exercise go a long way.^7,5
Split the sets over whichever days suit you, and stop sets close to failure rather than always grinding to it.^4,6

How sure is this?

Most participants were young men: 79.1% of the 2,058 in the largest analysis were male, average age about 25, the trained-lifter review's conclusion is for young trained men, and the 8-week trial studied men only. Women and older adults are much less studied.^2,3,7
The trials are small and short. The trained-lifter review found only 7 trials lasting 6 to 24 weeks, and most didn't report what participants ate.³
Growth was measured as muscle thickness at a few spots, usually by ultrasound, so results for one muscle may not hold for the whole body.^7,3
Two authors of the failure meta-analysis earn income as writers and practitioners in the fitness industry. The strength meta-analysis and the 8-week trial declare no conflicts of interest.^6,5,7
For four sources (Schoenfeld 2017, Pelland 2026, Schoenfeld 2019 on frequency, and the ACSM position stand) we could read only the abstract, so we use only the main results reported there and couldn't check their funding statements.^1,2,4,8

Common questions

How many sets per muscle group per week for hypertrophy?

About 10 or more hard sets per muscle a week. A review of trained lifters suggests 12–20, because above 20 most muscles grew little more.^1,3

Is 10 sets per week enough to build muscle?

For most people, yes: the early studies, mostly in beginners, favoured more than 9 weekly sets per muscle. People who have trained for years may need 12–20.^1,3

Is 20 sets per muscle too much?

Not necessarily, but for the thighs and biceps it grew no more muscle than 12–20 sets, and every extra set adds less than the one before. Sessions also get long: 5 sets per exercise took about 68 minutes.^3,2,7

How many sets per workout?

Work back from the weekly total. When weekly sets were equal, training a muscle once, twice or three times a week made no meaningful difference, so split them however fits your schedule.⁴

Do you have to train to failure to build muscle?

No. In a meta-analysis of 15 studies, sets taken to momentary failure built no more muscle than sets stopped short of it. Sets should still be hard.⁶

How many sets do you need for strength?

Fewer than for size. Trained men gained as much squat and bench strength from 1 set per exercise, three times a week, as from 3 or 5 sets.^7,5

Sources

Schoenfeld BJ, Ogborn D, Krieger JW. Dose-response relationship between weekly resistance training volume and increases in muscle mass: A systematic review and meta-analysis. Journal of Sports Sciences, 2017. Meta-analysis. doi.org/10.1080/02640414.2016.1210197
Pelland JC, Remmert JF, Robinson ZP, Hinson SR, Zourdos MC. The Resistance Training Dose Response: Meta-Regressions Exploring the Effects of Weekly Volume and Frequency on Muscle Hypertrophy and Strength Gain. Sports Medicine, 2026. Meta-analysis. doi.org/10.1007/s40279-025-02344-w
Baz-Valle E, Balsalobre-Fernández C, Alix-Fages C, Santos-Concejero J. A Systematic Review of The Effects of Different Resistance Training Volumes on Muscle Hypertrophy. Journal of Human Kinetics, 2022. Meta-analysis. doi.org/10.2478/hukin-2022-0017
Schoenfeld BJ, Grgic J, Krieger J. How many times per week should a muscle be trained to maximize muscle hypertrophy? A systematic review and meta-analysis of studies examining the effects of resistance training frequency. Journal of Sports Sciences, 2019. Meta-analysis. doi.org/10.1080/02640414.2018.1555906
Ralston GW, Kilgore L, Wyatt FB, Baker JS. The Effect of Weekly Set Volume on Strength Gain: A Meta-Analysis. Sports Medicine, 2017. Meta-analysis. doi.org/10.1007/s40279-017-0762-7
Refalo MC, Helms ER, Trexler ET, Hamilton DL, Fyfe JJ. Influence of Resistance Training Proximity-to-Failure on Skeletal Muscle Hypertrophy: A Systematic Review with Meta-analysis. Sports Medicine, 2023. Meta-analysis. doi.org/10.1007/s40279-022-01784-y
Schoenfeld BJ, Contreras B, Krieger J, Grgic J, Delcastillo K, Belliard R, Alto A. Resistance Training Volume Enhances Muscle Hypertrophy but Not Strength in Trained Men. Medicine & Science in Sports & Exercise, 2019. Randomised trial. doi.org/10.1249/MSS.0000000000001764
American College of Sports Medicine. American College of Sports Medicine position stand. Progression models in resistance training for healthy adults. Medicine & Science in Sports & Exercise, 2009. Position stand. doi.org/10.1249/MSS.0b013e3181915670

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