The Claim
When teenage rugby players train one leg at a time on the leg press machine, they get much stronger in that single leg than when they train both legs together at the same time.
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.
When teenage rugby players train one leg at a time on the leg press machine, they get much stronger in that single leg than when they train both legs together at the same time.
See the scientific wording
Unilateral leg press training is more effective than bilateral leg press training for improving unilateral lower body strength in adolescent male rugby players, producing a 20.2% increase (d = 0.81) compared to 12.4% (d = 0.45), indicating that training one leg at a time leads to greater strength gains on that side.
What the research says
1 studyTraining one leg at a time made the players stronger on that one leg more than training both legs together did, which is exactly what the claim says.
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.