What Is Training Volume in Lifting?

Two ways to measure training volume

Volume load is the total weight you moved. It's easy to calculate and useful for comparing sessions of the same exercise: if your bench volume rises week to week at a similar effort, you're doing more work. But it rewards light, high-rep sets. Twenty reps at 40 kg and eight reps at 100 kg are both 800 kg, and they're very different sets.

Hard sets count effort instead of kilos. A hard set is one that ends close to failure, roughly three or fewer reps in reserve. A systematic review concluded that counting sets taken to or near failure is a valid way to measure volume for muscle growth, anywhere from about 6 to 20 or more reps per set, as long as everything else stays the same (Baz-Valle 2021). That's why most muscle-building advice is written in weekly sets rather than kilos.

Why training volume matters

Volume is one of the strongest levers you have for muscle growth. A meta-analysis found that each extra weekly set was linked to a little more growth, and that 10 or more weekly sets per muscle beat fewer than 5 (Schoenfeld 2017). A larger 2026 analysis of 67 studies found muscle size and strength both rise with volume, with diminishing returns, and the returns flatten much sooner for strength (Pelland 2026).

So more is better, up to a point, and the point comes earlier if strength is your goal. Where to start, and when to add more, is its own question. See how many sets per muscle group per week.

Volume and progressive overload

Adding a rep or a set raises your volume, and that's a form of progressive overload just like adding weight. It's the usual way to keep progressing when the next weight jump is too big. But rising volume isn't automatically progress. If volume climbs while every set feels harder than last week, fatigue is building faster than you're recovering.

How Sweatora tracks volume

Sweatora counts volume load (weight × reps) for every set you log, with no extra input. Each exercise's stats screen charts its volume per session. The Stats screen totals it for any date range you pick and splits it by muscle group, so a neglected muscle stands out. It doesn't count hard sets per muscle for you. For that, your logged effort ratings tell you which sets were hard. Both numbers become more useful the longer you keep tracking workout progress.