Why volume matters
Volume is the most reliable predictor of hypertrophy and strength outcomes in the training literature. Schoenfeld’s 2017 meta-analysis (Journal of Sports Sciences) shows a clear dose-response: more weekly sets per muscle group → more growth, up to roughly 10–20 sets per muscle per week. Beyond that, recovery becomes the limiter and additional volume produces diminishing or negative returns.
Working sets vs total sets
A “working set” is a set taken to within a few reps of failure. Warm-up sets, drop-back sets and rehab work don’t count toward weekly volume targets. If your programme has 12 working sets of bench press across the week (say 4 sets × 3 sessions), that’s a moderate volume for chest. Add some incline dumbbell press at 6 sets/week and you’re at 18 — toward the upper end for most intermediate lifters.
Tracking progressive overload
Use this calculator weekly. If your total session tonnage isn’t increasing across a month, your programme isn’t producing progressive overload — usually because the lifts aren’t close enough to failure, or recovery is impaired by sleep, nutrition or stress. Volume can increase via more weight (same reps), more reps (same weight) or more sets — any of the three counts. The first two are the most reliable indicators of getting stronger.