The Claim
A five-week high-volume static stretching program (30-minute sessions, twice weekly) is associated with small but statistically significant increases in plantar-flexor muscle strength in healthy young adults, with observed improvements of approximately 6.4% in isometric contraction and 7.8% in concentric contraction at 120°/s, suggesting enhanced neuromuscular performance without structural muscle changes.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Doing static stretching for five weeks, twice a week for half an hour, can slightly but noticeably make your calf and ankle muscles stronger. This happens because stretching helps your nerves and muscles work together better, rather than actually making the muscle tissue itself bigger.
See the scientific wording
A five-week high-volume static stretching program, consisting of 30-minute sessions twice weekly, is associated with small but statistically significant increases in plantar-flexor muscle strength in healthy young adults. Specifically, strength improvements of approximately 6.4% in isometric contraction and 7.8% in concentric contraction at 120°/s were observed, indicating that prolonged stretching may enhance neuromuscular performance without altering muscle structure.
What the research says
1 studyA five-week stretching routine twice a week actually made the calf muscles stronger, even though the muscles themselves didn't grow bigger. This shows that stretching can improve how your nerves and muscles work together, not just change their size.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.