How many sets and reps should I do to build muscle?

To build muscle, aim for about 10 or more hard sets per muscle group each week, spread over two or more sessions. Most rep ranges from about 6 to 30 build muscle as long as each set ends close to failure; 6 to 12 reps is the most practical for most people. For maximum strength, also train heavier sets of 1 to 6.

Sets: count them per week

A 2017 review found a clear link between weekly sets and muscle growth. People doing 10 or more sets per muscle each week grew more than people doing fewer. Count only hard sets, the ones that end within a few reps of failure.

Spread those sets over at least two sessions a week. A biceps workout of 10 sets once a week is less useful than 5 sets on two different days.

Reps: effort matters more than the number

When researchers compared heavy and light weights, muscle growth was similar as long as sets went close to failure. Heavy sets built more maximum strength. So:

• For muscle: most sets in the 6 to 12 range, some higher for smaller muscles.
• For strength: add heavier sets of 1 to 6 on your main lifts.
• For both: stop each set 1 to 3 reps short of failure (about RPE 7 to 9).
• For endurance: lighter sets of 15 to 30 still build muscle if they end close to failure.

A starting point

Add sets slowly. If your progress keeps improving and you recover well, the extra work is paying off.