correlational
Analysis v1
Strong Support
Just because your quad feels like it's working hard during leg lifts doesn't mean that part of the muscle is actually lighting up — especially in people who train regularly.
48
0
Evidence from Studies
Supporting (1)
48
Community contributions welcome
48
Hip flexion angle affects longitudinal muscle activity of the rectus femoris in leg extension exercise
Cross-Sectional Study
Human
2023 JunThe study found that how hard people *felt* their thigh muscles were working during leg exercises didn’t match what the MRI showed was actually happening in different parts of the muscle. This means feeling the burn isn’t always a good sign of which muscle parts are really being worked.
Contradicting (0)
0
Community contributions welcome
No contradicting evidence found
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.