How many hard sets per muscle, per week?

A short, source-backed answer to the most measured question in hypertrophy research.

~3 min read·last reviewed ·7 sources linked

From the same series: do you have to train to failure? · how long to rest between sets? · how many times per week? · the whole series

Short answer: in trained adults, about 10 hard sets per muscle per week is the usual practical reference, and most people grow more in the 12–20 range. A hard set is one taken to 0–3 reps from failure (RIR 0–3). The evidence describes a continuous gradient: each extra set adds, a little less each time.

Practical reference
~10
hard sets / muscle / week, in trained adults12
Productive range
12–20
where most lifters do most of their growing
What counts
RIR 0–3
a working set taken close to failure47

§1The shape of the curve

One finding the literature has been repeating for a decade: in trained adults, no other training variable moves muscle growth quite like the number of hard sets you do per muscle, per week.123 The gap is real, and smaller than it sounds: in the meta-regressions, going from 5 to around 13 weekly sets per muscle is worth between 1 and 3 extra percentage points of muscle gained over 2–3 months.3 Same gym, same exercises; what changes is the dose.

Extra muscle gained · 2–3 months PRODUCTIVE RANGE → 0% +4% 0 5 12 22+ Weekly hard sets per muscle
The first sets you add each week buy you the most growth; from there each extra set adds a little less, with no clear ceiling inside the range studied. Pelland 2026 · Baz-Valle 2022

§2What we know — and what we don't

What we know
  • More weekly sets → more hypertrophy, up to a high ceiling.1
  • ~10 sets/muscle/week is the usual practical reference — the evidence describes a continuous gradient, not a proven threshold.12
  • 12–20 sets/week is a productive range for most lifters (coaching heuristic, not a single-study finding).
What we don't
  • That a single optimal set count applies broadly. Individual ceilings vary with recovery, exercise selection, training age.5
  • That higher is always better, with no ceiling. Returns diminish and recovery cost dominates at high volumes.36

§3What range should each muscle group get?

The nine muscle groups GymSets counts for growth. Cardio is tracked too but has no volume target, and four more (adductors, traps, forearms, rotators) can be switched on. Calibration targets, not prescriptions: start at the lower end and ramp from there.

Weekly hard sets per muscle group — calibration targets, not prescriptions.
Muscle groupSets / weekNote
Chest10 – 20Counts pressing overlap with triceps and front delts.
Back12 – 22Larger group; tolerates more volume.
Shoulders12 – 20Side and rear delts often need direct work.
Biceps10 – 18Counts pulling overlap.
Triceps10 – 18Counts pressing overlap.
Quads10 – 20Quality over quantity past 16.
Posterior chain (hams + glutes)10 – 18Hinges + targeted hip thrust split well.
Calves10 – 20Low per-set recovery cost.
Core10 – 20Trains like any other muscle — load matters.
How to read these numbers: a meta-analysis pools and re-analyses every published study on a question. ES and SMD measure effect size — how much real difference there is between groups: 0.2 is considered small, 0.5 medium. The CI (confidence interval) is the margin of error: if it includes zero, the difference may not exist. An RCT is a trial with randomly assigned groups.

§4Three things that break the math

01
Inconsistent intensity. Eight sets at RIR 0–1 and eight at RIR 4–5 are not the same dose. Log perceived effort alongside reps.4
02
Junk volume. Lazy or filler sets thrown in just to hit a number. They count on paper but don't push the muscle hard enough to grow.
03
No record kept. Recall for training load fails past a few sessions. The number you think you did diverges from the one you actually did.

§5References

  1. Schoenfeld, B. J., Ogborn, D., & Krieger, J. W. (2017). Dose-response relationship between weekly resistance training volume and increases in muscle mass: a systematic review and meta-analysis. Journal of Sports Sciences, 35(11), 1073–1082. doi.org/10.1080/02640414.2016.1210197
  2. Baz-Valle, E., Balsalobre-Fernández, C., Alix-Fages, C., & Santos-Concejero, J. (2022). A systematic review of the effects of different resistance training volumes on muscle hypertrophy. Journal of Human Kinetics, 81, 199–210. doi.org/10.2478/hukin-2022-0017
  3. Pelland, J. C., Remmert, J. F., Robinson, Z. P., Hinson, S. R., & Zourdos, M. C. (2026). The resistance training dose–response: meta-regressions exploring the effects of weekly volume and frequency on muscle hypertrophy and strength gains. Sports Medicine, 56(2), 481–505. doi.org/10.1007/s40279-025-02344-w
  4. Helms, E. R., Cronin, J., Storey, A., & Zourdos, M. C. (2016). Application of the repetitions in reserve-based rating of perceived exertion scale for resistance training. Strength and Conditioning Journal, 38(4), 42–49. doi.org/10.1519/SSC.0000000000000218
  5. Currier, B. S., McLeod, J. C., Banfield, L., et al. (2023). Resistance training prescription for muscle strength and hypertrophy in healthy adults: a systematic review and Bayesian network meta-analysis. British Journal of Sports Medicine, 57(18), 1211–1220. doi.org/10.1136/bjsports-2023-106807
  6. Heaselgrave, S. R., Blacker, J., Smeuninx, B., McKendry, J., & Breen, L. (2019). Dose-response relationship of weekly resistance-training volume and frequency on muscular adaptations in trained men. International Journal of Sports Physiology and Performance, 14(3), 360–368. doi.org/10.1123/ijspp.2018-0427
  7. Schoenfeld, B. J., Grgic, J., Van Every, D. W., & Plotkin, D. L. (2021). Loading recommendations for muscle strength, hypertrophy, and local endurance: a re-examination of the repetition continuum. Sports, 9(2), 32. doi.org/10.3390/sports9020032