Weekly Volume Calculator

Where 10 to 20 comes from

A dose-response meta-analysis found muscle growth increased with weekly set volume, with the clearest returns accumulating up to around 10 sets per muscle per week and continuing more gradually beyond that. Subsequent work has pushed the upper end higher for some people, but returns flatten and fatigue rises.

• Under 4 sets: below what reliably maintains muscle.
• 4–9 sets: maintenance, and genuine growth for beginners.
• 10–20 sets: where most of the evidence sits. A good target.
• 21–26 sets: high. Workable with good recovery; check progress is still moving.
• 27+ sets: very high. Most people do better with less.

What counts as a hard set

A working set taken within roughly three reps of failure. Warm-ups do not count, and neither do sets you stopped well short of a challenge.

This matters because it changes the arithmetic completely. Twenty sets where half are easy is not twenty hard sets — and coaches who count everything routinely over-estimate their clients' volume.

Count sets that train the muscle in question, including indirectly: a barbell row trains biceps meaningfully, and a bench press trains triceps. Whether to count those as full or half sets is a matter of convention — be consistent either way.