Volume
Short definition
Volume — total training load (sets × reps × weight).
Full definition
Training volume is the quantitative load: sets × reps × weight (or % 1RM). It is the main hypertrophy driver — too low gives no stimulus, too high leads to overtraining. In isometrics volume = sets × duration × %MVC.
Examples
Weekly volume: 80 sets, 600 reps, 12000 kg.