For men who regularly lift weights, increasing their weekly training volume by 30% from about 12 sets led to a measurable improvement in how many repetitions they could perform at 70% of their...
Mechanism
Synthesis from 1 study
Doing a bit more lifting helps muscles handle the burn better, so you can do more reps. But doing way more makes them too tired to adapt, so you don’t get any extra benefit.
Most probable mechanism
When the muscles do a little more work than usual, they get better at handling the burn and tired feeling during repeated lifts. This lets you do more reps before giving out. But if you do too much more, the muscles get too worn out and can’t adapt as well, so you don’t get stronger endurance.
Moderate increase in training volume elevates intramuscular metabolite accumulation (e.g., lactate, hydrogen ions) during repeated contractions, triggering signaling pathways that enhance muscle buffering capacity and mitochondrial efficiency.
Enhanced buffering and metabolic efficiency delay acidosis and fatigue onset during sustained submaximal contractions, increasing the number of repetitions possible before failure.
Excessive volume leads to chronic accumulation of fatigue-inducing metabolites and insufficient recovery, impairing adaptive signaling and reducing net gains in fatigue resistance.
Evidence from Studies
Supporting (1)
Community contributions welcome
Training Volume Increases Or Maintenance Based On Previous Volume: The Effects On Muscular Adaptations In Trained Males.
Contradicting (0)
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Gold Standard Evidence Needed
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