When you squat all the way down without locking your knees, your thigh muscle gets more oxygen-deprived than if you stop short and lock your knees — which might help build muscle.

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Pro

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Against

Evidence from Studies

Supporting (1)

33

Community contributions welcome

33

Exercise speed and workload effects on muscle hypoxia in vastus lateralis muscle during squatting exercises

Cross-Sectional Study

Human

When people do squats with their knees bending all the way (not locked), their thigh muscle gets more oxygen-starved than when they keep their knees straight — and this study proved it by measuring oxygen levels in the muscle.

Contradicting (0)

0

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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.

Source Study

Exercise speed and workload effects on muscle hypoxia in vastus lateralis muscle during squatting exercises

Score: 33

DOI: 10.55860/knxz7210

Similar Assertions

If you keep your knees bent while squatting (no locking), your thigh muscle gets more oxygen-starved than if you lock your knees at the top — even if you do it for the same amount of time.

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95%

When you do squats without fully straightening your knees and restrict blood flow, your thigh muscle gets much less oxygen during the exercise than when you're just sitting still.

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90%

Even short, locked squats (8 seconds) can make your thigh muscle very low on oxygen — but only if you keep your knees bent and restrict blood flow.

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0

90%

When you restrict blood flow to your thigh while squatting, your muscle gets much less oxygen — no matter how you move your knee.

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90%

Even if you lock your knees at the top of a squat, your thigh muscle still gets less oxygen during the exercise than when you're just standing still — but not as much as if you keep your knees bent.

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33

88%