Doing strength exercises with your muscle bunched up for 8 weeks can make the muscle fibers angle more sharply, which might help them generate more force.

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Against

Evidence from Studies

Supporting (1)

46

Community contributions welcome

46

Differential changes in muscle architecture and neuromuscular fatigability induced by isometric resistance training at short and long muscle-tendon unit lengths.

Randomized Controlled Trial

Human

2020 Jul 1

The study had people do a specific type of leg exercise for 8 weeks, and found that their tibialis anterior muscle got slightly thicker in a way that increased its pennation angle by about 6% — exactly what the claim says.

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No contradicting evidence found

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Source Study

Differential changes in muscle architecture and neuromuscular fatigability induced by isometric resistance training at short and long muscle-tendon unit lengths.

Score: 46

DOI: 10.1152/japplphysiol.00280.2020

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