Training volume

The total amount of work done, often counted as hard sets per muscle per week.

Training volume is the total quantity of work performed. It can be counted as tonnage, meaning sets multiplied by reps multiplied by load, but for muscle growth the more useful count is simply the number of hard sets per muscle group per week.

The reason tonnage misleads is that it flatters heavy compound lifts and undercounts everything else. Ten thousand kilograms of deadlifts and ten thousand kilograms of lateral raises are the same number and nothing like the same stimulus for the same muscle. Counting sets keeps the arithmetic honest.

A hard set means one taken within a few reps of failure. Sets that stop well short still cost time and fatigue while contributing little, which is where the phrase junk volume comes from. If you would count a set on the way to the gym, count it only if it would have been uncomfortable to add two more reps.

Volume is the closest thing resistance training has to a dose. A meta-regression of 15 studies found a significant effect of weekly sets on muscle size, with each additional set associated with about 0.37% more growth. A later systematic review comparing moderate with high volumes reached the same shape of answer: more is better up to a point, and the point is individual.

That point is recovery. Growth needs the stimulus and the repair, and the second one is bounded by sleep, food, stress and everything else in your week. This is why most people settle around 10 to 20 hard sets per muscle per week, why a stalled trainee often needs a few sets more, and why a permanently exhausted one usually needs fewer.

Spreading the work helps. The same weekly sets split across two or three sessions per muscle tend to be higher quality than all of them in one long session, because the later sets of a long session are performed tired. Frequency is a way of buying quality volume, not a separate driver.

In practice, count sets per muscle rather than per exercise, remember that a bench press is chest volume and triceps volume at once, and adjust by a set or two at a time rather than doubling. Our training volume calculator does the tally, including the indirect work.

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