The Claim
In male bodybuilders performing leg extension exercises at 80° of hip flexion, the distal region of the rectus femoris exhibits a greater increase in T2 signal compared to the middle region, indicating a shift in longitudinal muscle activation toward the distal portion under high 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 80 degrees, the lower part of their front thigh muscle works harder than the middle part, according to MRI scans.
See the scientific wording
At 80° hip flexion during leg extension exercise, the distal region of the rectus femoris shows greater T2 signal increase than the middle region in male bodybuilders, suggesting a shift in longitudinal activation toward the lower portion of the muscle at high hip flexion angles.
What the research says
1 studyThe study found that when bodybuilders do leg extensions with the hips bent at 80 degrees, the lower part of the front thigh muscle works harder than the middle part, 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.