Count only hard sets
Warmups and easy pump sets do not count toward the 10 to 20. A hard set means you stopped with roughly 0 to 3 reps left in the tank. If you leave 5 or more reps in reserve, that set barely moves the needle.
Aim for about 10 to 20 hard sets per muscle per week, taken close to failure and spread across two sessions.
Most people grow well on 10 to 20 hard sets per muscle per week, meaning sets stopped within 0 to 3 reps of failure. Beginners can build on the low end near 10, while advanced lifters often need the upper end. Split the volume across two sessions per week so each muscle gets hit while fresh rather than crammed into one long day.
Warmups and easy pump sets do not count toward the 10 to 20. A hard set means you stopped with roughly 0 to 3 reps left in the tank. If you leave 5 or more reps in reserve, that set barely moves the needle.
Doing 18 chest sets in one day gives diminishing returns after the first 8 to 10. Splitting into two sessions of 9 keeps quality high and lets you push each set harder. Frequency of two per muscle is the sweet spot for most people.
Begin at 10 to 12 sets, run it for a few weeks, and only add volume if progress stalls and you are recovering well. More is not automatically better, and adding sets past your recovery just costs sleep and joints without extra growth.
Aim for about 10 to 20 hard sets per muscle per week, taken close to failure and spread across two sessions.