Some studies say full-range lifting makes muscle fibers longer, but the tools used to measure this might be inaccurate, so we can’t be sure it’s really happening.

28

Pro

0

Against

Evidence from Studies

Supporting (1)

28

Community contributions welcome

28

Does longer-muscle length resistance training cause greater longitudinal growth in humans? A systematic review

Systematic Review

Human

2026 Jan

The study looked at weight training that stretches muscles more, and found that while it might make muscle fibers grow longer, the way scientists measure this growth might be flawed — which is exactly what the claim says.

Contradicting (0)

0

Community contributions welcome

No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Does longer-muscle length resistance training cause greater longitudinal growth in humans? A systematic review

Score: 28

DOI: 10.1016/j.smhs.2025.03.001

Similar Assertions

When people train with their muscles stretched out, the longer their muscle fibers get, the more quickly they tire out during repeated efforts.

46

0

72%

Your muscle fibers don’t get longer with one training method over another—whether you go to failure, use pyramids, or stick to the basics—as long as you do the same total amount of work.

54

0

70%