Evidence brief

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 2026-05·7 sources linked

Minimum effective
~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 failure4

§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 And the gap is wide — in controlled trials, lifters who train at around 12–15 weekly sets per muscle gain roughly twice as much muscle over 2–3 months as those training at 5. 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 most of the growth; past the productive range, returns flatten fast. Schoenfeld 2017 · 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 minimum effective dose in trained adults.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.
  • That higher is always better, with no ceiling. Returns flatten and recovery cost dominates at high volumes.5

§3Working ranges per muscle group

Aligned with the muscle groups GymSets uses by default. Calibration targets, not prescriptions — start at the lower end and ramp from there.

Muscle group
Sets / week
Note
Chest
10 – 20
Counts pressing overlap with triceps and front delts.
Back
12 – 22
Larger group; tolerates more volume.
Shoulders
12 – 20
Side and rear delts often need direct work.
Biceps
10 – 18
Counts pulling overlap.
Triceps
10 – 18
Counts pressing overlap.
Quads
10 – 20
Quality over quantity past 16.
Posterior chain (hams + glutes)
10 – 18
Hinges + targeted hip thrust split well.
Calves
10 – 20
Low per-set recovery cost.
Core
10 – 20
Trains like any other muscle — load matters.

§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.6

Why this needs an app

Most fitness apps log workouts. The literature points one level up — sets per muscle per week. That number only exists if every set is tagged, summed, and shown where you actually look.

GymSets makes it the home-screen metric. PRs, history and your weekly plan flow from the same data model.

Download on theApp Store

iOS only · free trial, no card required.

§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., Robinson, Z. P., Remmert, J. F., et al. (2024, preprint). The resistance training dose-response: meta-regressions exploring the effects of weekly volume and frequency on muscle hypertrophy and strength gain. SportRxiv. sportrxiv.org/server/article/460
  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., Greig, M., & 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