Volume load, also called tonnage, is the total load you move in an exercise, session or week, calculated as weight × reps × sets. It is one of several ways to measure training volume, alongside total reps, time under tension and the number of hard sets.
Formula and example
Volume load = weight × reps × sets
Example: Three sets of squats with 100 kg for 8 reps each come to 100 × 8 × 3 = 2,400 kg. If you manage 9 reps per set with the same weight the following week, volume load rises to 2,700 kg. This is a worked example.
That shows what volume load is good for: within the same exercise it makes progressive overload visible, whether you add reps or weight.
Why sets count more for muscle growth
For hypertrophy, a simpler measure has become the standard: the number of hard sets per muscle group per week. A systematic review (Baz-Valle et al. 2021) considers set count a suitable method as long as sets go to or close to failure and reps fall roughly between 6 and 20 or more. A set of 8 and a set of 15 then count the same, provided both are hard enough.
Volume load distorts that comparison. Heavy compound lifts produce far more kilograms than a set of lateral raises, although both can be hard sets. Light sets far from failure push volume load up without much stimulus. For weekly planning, counting hard sets works better; for progress on a single exercise, volume load can be a useful addition.