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How many sets per muscle
per week
The short answer: to build muscle, the evidence supports 10 or more sets per muscle per week, and for young trained men a range of 12 to 20 is suggested. Each extra set keeps adding, but less and less. To gain strength you need quite a lot fewer. You don’t need to go to failure: stopping 1–3 reps short is enough. It makes no difference whether you split them over one or two days. And for health, the WHO asks for strength training 2 or more days a week. These are averages: the response varies a lot from one person to another.
Every figure links to its study and says how strong the evidence is.
At a glance
- For health. Strength training for the major muscle groups, 2 or more days a week (WHO 2020).
- To build muscle, per muscle per week: 10 or more (ACSM 2026) and 12 to 20 in young trained men (Baz-Valle 2022). More keeps adding, less and less (Pelland 2026).
- To gain strength. A few sets with heavy loads already give almost everything detectable (Pelland 2026; Currier 2023).
- Close to failure, without having to get there. It gives the same as going to failure (Refalo 2024).
A set counts for a muscle when it works that muscle directly. In the largest meta-analysis, sets in which the muscle only assists (the triceps in the bench press, for example) were counted as half a set (Pelland 2026).
1. To build muscle
- Strong evidence · meta-analyses More sets, more muscle, but less and less. Across 67 studies with 2,058 people and muscle measured by ultrasound or MRI, each weekly set added on average 0.24% growth, with diminishing returns and no clear ceiling. Going from 5 to 10 sets is noticeable; from 20 to 30 you have to add many more to notice anything (Pelland 2026). There are few studies above about 25 sets, the average age was 25 and 79% were men.
- Strong evidence · meta-analyses 10 or more sets per muscle group per week improve hypertrophy, according to the position stand of the American College of Sports Medicine, which reviews 137 systematic reviews (ACSM 2026).
- Strong evidence · meta-analyses Between 12–20 and more than 20 sets, in trained men, there was no difference in the quadriceps or biceps and some in the triceps (Baz-Valle 2022, only 6 trials). The first meta-analysis on volume had already seen that each set adds (Schoenfeld 2017).
2. To gain strength
- Strong evidence · meta-analyses Less volume is needed. One set a week already gave detectable strength, and beyond about 5 no detectable improvements appeared consistently; part of that gain is learning the test exercise (Pelland 2026; Ralston 2017).
- Moderate evidence · trials With 1, 3 or 5 sets per exercise, 34 trained men gained similar strength, but more muscle with more sets (Schoenfeld 2019).
- Strong evidence · meta-analyses For maximal strength, heavy loads (more than 80% of your maximum); for muscle, all loads gave comparable results when training close to failure (Currier 2023; Lopez 2021; Schoenfeld 2017).
3. Each muscle once or twice a week?
- Strong evidence · meta-analyses With the same total sets, it makes no difference for muscle(Schoenfeld, Grgic and Krieger 2019, 25 studies) or for strength (Grgic 2018, 22 studies). Splitting them helps you do more sets without the last ones being done tired.
4. Do you have to go to failure?
- Strong evidence · meta-analyses You don’t need to. Going to failure did not give more strength or more muscle than stopping close to it (Grgic 2022, 15 studies); the advantage, if any, is trivial (Refalo 2023).
- Moderate evidence · trials In people who already train, a bit more muscle. In the subanalysis of trained people in that same work, going to failure did give a bit more muscle, with a small difference (Grgic 2022).
- Moderate evidence · trials Being close does matter: the closer to failure, a bit more muscle (Robinson 2024), and leaving 1–2 reps in reserve the quadriceps grew the same as going to failure (Refalo 2024, 18 trained people).
5. How long to rest between sets
- Strong evidence · meta-analyses More than 60–90 seconds was associated with slightly more muscle; beyond 90 seconds no further difference was seen (Singer 2024, 9 studies).
- Moderate evidence · trials In heavy exercises, 3 minutes gave more strength and more thigh thickness than 1 minute in 21 trained men (Schoenfeld 2016).
6. If you are starting out, or training for health
- Strong evidence · meta-analyses Strength training 2 or more days a week for the major muscle groups, and more volume did not give more health benefit (WHO 2020).
- Strong evidence · meta-analyses Very little already gains something: a single set produces growth, and several give more (Krieger 2010). In untrained people, muscle grew 3.7% with 1 set and 5.2% with 3 (Hammarström 2020).
7. Over 60
- Strong evidence · meta-analyses The most effective was 2–3 sets per exercise, 2 days a week, with moderate-to-heavy loads (Borde 2015, 25 trials, low quality). Across 151 trials, a low volume already improved function and muscle; strength needed a bit more (Radaelli 2025).
8. Why it may work differently for you
- Moderate evidence · trials The response varies enormously. In 585 people who trained their arm for 12 weeks, muscle changed from −2% to +59% (Hubal 2005). In 287 people aged 19 to 78, age and sex did not explain those differences (Ahtiainen 2016). That is why it is useful to log what you do and see how you respond.
Frequently asked questions
How many sets per muscle per week to build muscle?
The 2026 position stand of the American College of Sports Medicine concludes that 10 or more sets per muscle group per week improve hypertrophy. In young trained men, a review with meta-analysis suggests 12 to 20 sets per muscle per week (Baz-Valle, 2022, 6 trials). More sets keep adding, but each one adds less, and no clear ceiling appeared (Pelland, 2026, 67 studies).
How many sets do you need to gain strength?
Quite a lot fewer than for muscle. In Pelland's meta-analysis (2026), one set a week already gave detectable strength, and beyond about 5 sets no detectable improvements appeared consistently. For maximal strength, heavy loads work better, above 80% of your maximum.
Is it better to train each muscle once or twice a week?
With the same total number of sets, it makes no difference for muscle: a meta-analysis of 25 studies found no differences (Schoenfeld, 2019). Splitting them over two days helps you do more sets with good quality.
Do you have to go to failure on every set?
No. Going to failure did not give more strength or more muscle than stopping close to it in several meta-analyses, although in people who already trained a subanalysis did see a bit more muscle. In a 2024 trial the quadriceps grew the same going to failure as leaving 1–2 reps in reserve. Stopping 1–3 reps short of failure is enough.
How long should you rest between sets?
Resting more than 60–90 seconds was associated with slightly more muscle than resting less, and beyond 90 seconds no further difference was seen (Singer, 2024). With heavy exercises, 3 minutes gave more strength than 1 in a trial.
What if I only want to train for health?
The WHO recommends strength exercises for the major muscle groups 2 or more days a week, and did not find that more volume gives more health benefit. With very few sets you already gain some strength and muscle.
The exercises, step by step
How to do each one, the most common mistakes and the variations, in its exercise guide:
Count your sets without a notebook
In Reverfit Workout you log every set with its weight and reps, and the muscle map colors each muscle by the sets you have done for it and tells you how many it has, for the day, the week or the month.
Workout
