The Claim
Even though the players got stronger, their ability to jump higher or more powerfully didn’t improve after five weeks of leg press training — meaning strength on the machine doesn’t automatically make you jump better.
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.
Even though the players got stronger, their ability to jump higher or more powerfully didn’t improve after five weeks of leg press training — meaning strength on the machine doesn’t automatically make you jump better.
See the scientific wording
Five weeks of unilateral or bilateral leg press training does not improve vertical jump height or peak power in adolescent male rugby players, as no significant changes were observed in countermovement jump performance despite increases in lower body strength, indicating a lack of transfer from machine-based strength training to explosive power in this context.
What the research says
1 studyEven though the players got stronger from doing leg presses, they didn’t jump any higher—showing that getting stronger on machines doesn’t always make you more explosive in sports.
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.