The Claim
In healthy adult males, antagonist hamstring co-activation during maximal isometric knee extension is significantly higher in the seated position (26 ± 20.4 Nm) compared to the supine position (12 ± 7.4 Nm), suggesting greater inhibitory muscle activity when the hip is in a flexed position.
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 guys sit down and squeeze their quads as hard as they can, their hamstrings resist more than when they're lying flat — probably because the hips are bent.
See the scientific wording
Antagonist hamstring co-activation during maximal isometric knee extension is higher in the seated position (26 ± 20.4 Nm) than in the supine position (12 ± 7.4 Nm) in healthy adult males, indicating greater inhibitory muscle activity when the hip is flexed.
What the research says
1 studyThe study found that the hamstrings resist the movement more when the person is sitting compared to lying down, which matches what the claim says.
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.