The Claim

Does keeping knees bent during squats cause more muscle oxygen deprivation than locking them?

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

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
33score
Challenges
0score

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

Description
1 study reviewed
In plain English

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.

See the scientific wording

Under blood flow restriction during squatting, sustained knee flexion (non-locked) produces greater intramuscular hypoxia in the vastus lateralis than brief or partial knee extension (locked), as measured by tissue oxygen saturation (StO2).

What the research says

1 study

  1. Study: Exercise speed and workload effects on muscle hypoxia in vastus lateralis muscle during squatting exercises

    When people squat without fully locking their knees, their thigh muscle runs out of oxygen more than when they lock their knees — and this study proved it by measuring oxygen levels in the muscle.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

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.