The Claim
In resistance-trained females, the hamstrings-to-quadriceps and gluteus maximus-to-hamstring electromyographic co-activation ratios remain unchanged across training loads ranging from 40% to 90% of one-repetition maximum during both the ascending and descending phases of the barbell back squat, suggesting consistent neuromuscular coordination patterns irrespective of load intensity.
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 women who lift weights do squats with different levels of heavy weights, the way their thigh and butt muscles work together stays the same — no matter how heavy the weight is.
See the scientific wording
In resistance-trained females, hamstrings-to-quadriceps and gluteus maximus-to-hamstring co-activation ratios do not change significantly across training loads from 40% to 90% 1RM during either the ascending or descending phases of the barbell back squat, indicating stable inter-muscle coordination patterns regardless of load.
What the research says
1 studyStudy: Effect of external load on muscle activation during the barbell back squat
The study looked at how different squat weights affect muscle teamwork in trained women, and found that the balance between key leg muscles stays the same no matter the weight — just like 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.