The Claim
In resistance-trained men, performing unilateral leg extensions twice weekly for 8 weeks with volume-matched tempos results in substantial increases in maximal strength (17–22%) and muscle thickness (2–5%).
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 men who regularly lift weights, doing single-leg extension exercises twice a week for eight weeks leads to a 17–22% increase in maximal strength and a 2–5% increase in muscle thickness.
See the scientific wording
In resistance-trained men, unilateral leg extensions performed twice weekly for 8 weeks with volume-matched tempos produce substantial increases in maximal strength (17–22%) and muscle thickness (2–5%), indicating that even low-frequency, single-joint training can drive significant adaptations in trained individuals.
When muscles are stretched under load, the force pulls on muscle fibers and their internal structures, which signals the cells to build more muscle protein and tells the nervous system to activate more muscle fibers during effort, making the muscle stronger and thicker.
What the research says
1 studyEven doing leg extensions just twice a week for 8 weeks made strong men significantly stronger and their thighs bigger — proving that focused, simple workouts can still work wonders.
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.