Training · Moderate evidence
Weekly Volume: Sets per Muscle Group
More weekly sets per muscle produce greater hypertrophy, with diminishing returns; for strength, moderate volumes already capture most of the gains.
Meta-analyses and meta-regressions of controlled trials · 5 sources · 2 min
What the studies show
- Multiple sets per exercise outperform a single set for hypertrophy.
- Ten or more weekly sets per muscle were associated with greater hypertrophy than fewer than five, showing a dose-response relationship.
- In trained men, 5 sets per exercise produced greater hypertrophy than 1 or 3, but strength increased similarly.
- For strength, moderate and high volumes outperform low volumes, with diminishing returns that are more pronounced than for hypertrophy.
How Letz applies it
The plan targets between 6 and 22 weekly sets per muscle group based on experience (6 to 12 for beginners, 10 to 20 for intermediates, 12 to 22 for advanced trainees), and the auditor treats a muscle group with zero sets as a structural gap, not a low score.
Numbers derived from this rule
| Parameter | Range | Weight | Rule |
|---|---|---|---|
| Weekly sets per muscle group | 10–20 sets/week2 variants by context | 90% | Ten or more weekly sets per muscle produce greater hypertrophy; below four, the stimulus is insufficient; above twenty, returns diminish.Weekly Volume: Sets per Muscle Group · Minimum Effective Dose and Time-Efficient Training |
| Sets per exercise | 2–5 sets | 30% | Multiple sets per exercise outperform a single set; five per exercise is the practical ceiling per session.Weekly Volume: Sets per Muscle Group |
Who it applies to
Adults lifting weights, from beginner to advanced; counting working sets per muscle group per week.
Limits
Sets only count when performed with genuine effort and proper technique; individual ceilings vary, and excessive volume increases fatigue without proportional gains.
Sources
- Schoenfeld, Ogborn & Krieger, Journal of Sports Sciences, 2017 DOI 10.1080/02640414.2016.1210197
- Krieger, Journal of Strength and Conditioning Research, 2010 DOI 10.1519/JSC.0b013e3181d4d436
- Schoenfeld et al., Medicine & Science in Sports & Exercise, 2019 DOI 10.1249/MSS.0000000000001764
- Ralston et al., Sports Medicine, 2017 DOI 10.1007/s40279-017-0762-7
- Pelland et al., Sports Medicine, 2026 DOI 10.1007/s40279-025-02344-w
More in Training
- Resistance Training, Strength, and HypertrophyVarious training prescriptions improve strength and hypertrophy; heavier loads favor strength, and multiple sets favor hypertrophy.
- Frequency: training each muscle at least twice per weekTraining a muscle group twice a week is superior to once for hypertrophy; for strength, higher frequency helps primarily because it distributes volume more effectively.
- Load and rep rangeLight and heavy loads produce similar hypertrophy when sets are taken close to failure; heavy loads are superior for maximizing strength gains.
- Rest Between SetsRest intervals of two minutes or more favor strength and hypertrophy in compound exercises; short rest intervals work well when time is constrained.