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How many sets and reps should you do?

By Stelvo Team · · 7 min read

Short answer: to build muscle, do 10–20 hard sets per muscle group per week, mostly in the 6–12 rep range, with each set ending 1–3 reps short of failure. To build strength, work in the 1–6 rep range with loads around 80% of your max or heavier, for 2–5 sets per lift. Beginners should start at the bottom of those ranges — about 10 sets per muscle a week — and add from there.

Sets are a weekly budget, not a per-workout rule

Most "how many sets should I do" answers talk about a single workout: "3 sets of 10." That's the wrong unit. The research counts sets per muscle group per week, and it's the total that drives growth, however you split it up.

The clearest evidence is a 2017 meta-analysis that pooled 15 studies and found a graded dose-response: more weekly sets meant more muscle, with 10 or more sets per muscle per week growing muscle clearly better than fewer. A 2025 meta-regression covering 67 studies confirmed the shape — growth keeps rising with volume, but with diminishing returns as you go higher, and strength gains flatten out sooner than size does.

The 2026 ACSM position stand turned that into a plain recommendation: for hypertrophy, aim for roughly 10 sets per muscle group per week; for strength, lift heavier (about 80% of your one-rep max) for 2–3 sets per exercise.

How many reps should you do?

Reps set the load, and the load steers the adaptation:

Goal Reps per set Load (% of 1RM) Sets per exercise Rest
Max strength 1–6 80–95% 3–5 2–5 min
Muscle size 6–12 (5–30 works) 60–85% 2–4 1.5–3 min
Muscular endurance 15–25+ 40–60% 2–3 30–90 s
Learning a lift 8–12 Whatever you control 2–3 2 min

Two things to know before you treat those rows as law:

  • Strength really does need heavy loads. A 2017 meta-analysis comparing low- and high-load training found that maximal strength gains were clearly greater with heavy weights. If you want a bigger squat, you have to squat heavy some of the time.
  • Muscle doesn't care nearly as much. The same analysis found hypertrophy was similar across the whole loading spectrum, as long as sets were taken close to failure. A set of 25 taken near failure builds about as much muscle as a set of 8 — it's just more miserable.

How many reps to build muscle?

Practically, 6–12 reps for compound lifts (squat, press, row, deadlift variations) and 8–15 for isolation work (curls, lateral raises, leg extensions). Lower reps on compounds keep the loads meaningful; higher reps on isolation moves let you get close to failure without your joints or lower back giving out first.

The number that matters more than the rep count is how close you get to failure. A 2024 series of meta-regressions found that muscle growth increases as sets get closer to failure, while strength gains barely change. But the ACSM's 2026 review also found that going all the way to momentary failure didn't consistently improve results. The sweet spot: stop with 1–3 reps left in the tank on most sets, and save true failure for the last set of an isolation exercise if you want it.

How many sets per muscle group per week?

Use the table as a starting point and move within the range based on how you recover:

Training age Sets per muscle per week
First year 8–12
Intermediate (1–3 years) 12–18
Advanced 15–20+ (added gradually, per muscle, when a muscle stalls)

A few rules for counting:

  • Count hard sets only — sets taken within about 3 reps of failure. Warm-ups don't count.
  • Count indirect work at a discount. Rows and pulldowns train your biceps; presses train your triceps and front delts. A common approach is to count an indirect set as roughly half a direct set.
  • Don't jump straight to 20. The time-efficient training review by Iversen and colleagues points out that as few as 4 weekly sets per muscle produce meaningful progress if you're short on time. Volume is a dial you turn up when progress stalls, not a starting point.

How many sets per workout?

Split the weekly total across at least two sessions, so each muscle gets 5–10 hard sets per session. Beyond roughly 10 sets for one muscle in one workout, the extra sets tend to be junk: you're too fatigued to make them hard. That's the whole reason "each muscle twice a week" beats a once-a-week body-part split — same volume, better-quality sets. (See how many days a week you should train.)

Across the whole session, 15–25 hard sets is typical. Under 12 and you're probably leaving muscle on the table; over 30 and the session is either too long or full of half-effort sets.

How many sets of chest (or biceps) per week?

Worked examples with an upper/lower split, four days a week:

  • Chest, 12 sets: flat press 3 sets and incline dumbbell press 3 sets on upper day A; machine press 3 sets and cable fly 3 sets on upper day B.
  • Biceps, 6 direct + ~8 indirect: curls 3 sets on each upper day, plus rows and pulldowns that hit the biceps hard anyway. That "counts" as roughly 10 sets — plenty.
  • Quads, 12 sets: squat 3 and leg press 3 on lower day A; hack squat 3 and leg extension 3 on lower day B.

Small muscles (biceps, triceps, side delts, calves) recover fast and can take the higher end of the range; big compound-driven muscles (quads, back) are already getting a lot of systemic fatigue and usually sit at the lower end.

A simple week that hits the numbers

Day Session Hard sets
Mon Upper A: bench press 3, row 3, overhead press 3, pulldown 3, curl 2, triceps 2 16
Tue Lower A: squat 3, Romanian deadlift 3, leg press 2, leg curl 2, calves 3 13
Thu Upper B: incline press 3, chest-supported row 3, lateral raise 3, pull-up 3, curl 2, triceps 2 16
Fri Lower B: deadlift 3, hack squat 3, split squat 2, leg extension 2, calves 3 13

Every major muscle lands at 10–14 sets a week, twice a week, in under an hour a session.

How Stelvo handles this

Stelvo prescribes sets, reps, and a working weight for every exercise in your plan, and tracks your volume per body part week over week so you can see which muscles are getting the work. Ask the coach mid-workout — "is my chest volume going up?" or "what weight should I start hammer curls with?" — and it answers from your actual log, not a generic chart.

FAQ

Are 3 sets enough?

Three sets of one exercise is enough for that exercise. Whether it's enough for the muscle depends on the weekly total: three sets of bench once a week is 3 sets of chest, which is below the range; three sets across four exercises over two days is 12, which is right in it.

Is 5×5 good for building muscle?

Five sets of five at 80–85% is a strength program that also builds muscle, especially for beginners. Intermediates usually add higher-rep accessory work to get the weekly set count and rep variety up.

Do warm-up sets count?

No. Only sets taken close to failure count toward the weekly total. Warm-ups prepare you to do those sets; they don't replace them.

How many exercises per muscle?

Two to four per week, split across sessions. One heavy compound and one or two lighter movements that hit the muscle from a different angle cover almost everything.

Sources

General fitness information, not medical advice. Numbers are starting points for healthy adults — adjust them to how you recover.

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