The Claim
Shorter eccentric phase durations during resistance training enhance countermovement jump height by a practically worthwhile degree (Hedge’s g = −0.73) in trained individuals.
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.
In trained athletes, performing the lowering phase of resistance exercises more quickly increases the height of a countermovement jump by a meaningful amount.
See the scientific wording
Shorter eccentric phase durations during resistance training enhance countermovement jump height by a practically worthwhile degree (Hedge’s g = −0.73) in trained individuals, suggesting that faster eccentric contractions may optimize explosive power output in athletic populations.
When muscles are stretched quickly during a downward movement, the sensors in the muscles fire more strongly and store energy like a spring. This makes the muscles snap back faster and harder during the jump, producing more power.
What the research says
1 studyThis study found that when athletes lower weights faster during lifts, they jump higher afterward—exactly what the claim says. It’s like training your muscles to snap back quicker, which helps you leap better.
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.