The Claim

Bi-articular muscles, including the rectus femoris and hamstrings, experience functional conflict during compound movements such as squats, which limits their mechanical tension and results in minimal hypertrophy despite high overall leg loading.

Source: 4 Juicy new studies on how to build muscle

What the research says

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Supports
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Challenges
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These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

How it works
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In plain English

Even though squats work your legs hard, muscles like the hamstrings and front thigh muscle don't grow much because they get pulled in two directions at once during the movement.

See the scientific wording

Bi-articular muscles such as the rectus femoris and hamstrings experience functional conflict during compound movements like squats, limiting their mechanical tension and resulting in minimal hypertrophy despite high overall leg loading.

Score breakdown, mechanism chain, raw evidence, ideal studies needed

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.