The Claim
In male bodybuilders performing leg extension exercises at 70% of one-repetition maximum, a hip flexion angle of 40° is associated with greater T2 signal increases in the proximal and middle regions of the rectus femoris muscle compared to 80°, indicating higher localized muscle activity in these regions under moderate hip flexion conditions.
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 male bodybuilders do leg extensions with their hips bent at 40 degrees, the front thigh muscle works harder in certain areas than when their hips are bent more at 80 degrees.
See the scientific wording
In male bodybuilders performing leg extension exercises at 70% of one-repetition maximum, a hip flexion angle of 40° is associated with greater T2 signal increases in the proximal and middle regions of the rectus femoris muscle compared to 80°, suggesting higher localized muscle activity in these segments at moderate hip flexion.
What the research says
1 studyThe study found that when bodybuilders did leg extensions with a 40-degree hip bend, the upper and middle parts of the front thigh muscle worked harder than with an 80-degree bend, which matches the claim.
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.