The Claim
Static stretching training, performed at varying intensities, does not increase plantar flexor muscle strength or power output in young men over a four-week intervention period, with maximal voluntary isometric and concentric contraction torques and single-leg drop jump height remaining unchanged compared to baseline and control groups.
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 stretches, whether hard or easy, won't make your calf muscles stronger or more powerful over a month. Your strength and jumping ability stay exactly the same because stretching doesn't actually force your muscles to work hard enough to build strength.
See the scientific wording
Static stretching training, whether performed at high or low intensity, does not increase plantar flexor muscle strength or power output in young men over a four-week period. Maximal voluntary isometric and concentric contraction torques, as well as single-leg drop jump height, remain unchanged compared to baseline and control groups, indicating that passive stretching lacks the mechanical overload necessary to stimulate neuromuscular strength adaptations.
What the research says
1 studyThe study found that stretching your calf muscles, whether hard or easy, for four weeks did not make them stronger or help you jump higher. It only improved flexibility.
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.