The Claim
If you train one leg at a time, that leg gets much stronger than the other when tested alone — but if you train both legs together, both legs get stronger at the same rate, with no one leg getting ahead.
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.
If you train one leg at a time, that leg gets much stronger than the other when tested alone — but if you train both legs together, both legs get stronger at the same rate, with no one leg getting ahead.
See the scientific wording
In young women, unilateral training leads to lateral specificity in strength and neural activation gains — improvements occur primarily in the trained limb during unilateral tests — while bilateral training does not produce this specificity, enhancing both limbs equally.
What the research says
1 studyStudy: Neuromuscular Adaptations to Unilateral vs. Bilateral Strength Training in Women
When women trained one leg at a time, that leg got stronger than the other — but when they trained both legs together, both legs got equally stronger.
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.