How many sets per muscle per week?

After effort, volume — the number of hard sets per muscle per week — is the programme variable with the strongest link to muscle growth.

What the research shows

Schoenfeld, Ogborn and Krieger's 2017 meta-analysis found a clear dose-response: more weekly sets, more growth, up to a point. A larger 2024 analysis by Pelland and colleagues reached the same shape with more data — continued but diminishing returns as volume climbs.

In practice, most lifters make most of their progress at 10–20 hard sets per muscle per week. Beginners grow on the lower end; advanced lifters may benefit from the upper end for muscles they are prioritising.

What counts as a set

A hard set is one taken within roughly 0–3 reps of failure. Warm-ups and easy sets do not count.

Compound lifts train more than one muscle. A reasonable convention:

• Count the set fully for the prime movers (bench press → chest).
• Count it as half for assisting muscles (bench press → triceps, front delts; rows → biceps).

How to split it

There is a limit to how much useful work one muscle can do in one session — beyond about 8–10 hard sets, additional sets add little. So 16 sets for quads works better as two sessions of 8 than one session of 16.

That is the real argument for training each muscle twice a week: it lets you reach productive weekly volumes without junk sets.

Signs you are doing too much

• Lifts stall or go backwards for two to three weeks.
• Joints ache in ways that do not settle with a rest day.
• Sleep and motivation decline.

When that happens, cut volume by a third for a week, then build back up.

Auditing your programme

List every working set in your week, attribute it to muscles, and total them. The training volume calculator does the classification and shows which muscles are under-served. Fix one or two lagging muscles at a time rather than raising everything.