Training volume is the quantitative measure of training workload. In strength training: sets × reps × load (kg) per session or week. In endurance: hours or kilometres per week. Research shows 10-20 hard sets per muscle per week is the evidence-backed range for hypertrophy; above 20 may add benefit for advanced trainees. For endurance, running volume typically increases by no more than 10% per week. Volume is the primary driver of long-term adaptation — higher volume produces greater adaptations up to an individual tolerance threshold. Volume must be balanced with recovery capacity.
Key points
- Strength: sets × reps × load
- Endurance: hours or km per week
- 10-20 sets/muscle/week for hypertrophy
- Progressive volume increases drive long-term adaptation
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