The Claim
Full-range-of-motion resistance training does not consistently produce greater quadriceps hypertrophy than partial-range-of-motion resistance training in young, untrained men, as muscle volume increases are similar in MRI-based studies and outcomes are mixed in ultrasound-based studies, suggesting a threshold effect beyond which additional range of motion provides no added benefit.
What the research says
Challenges is higher
Challenge is ahead, but a single strong supporting 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.
Doing full squats or full arm movements when lifting weights doesn’t necessarily make your thigh muscles grow bigger than doing partial movements—studies show both ways work about the same, so going all the way down or all the way up might not give you extra muscle gains.
See the scientific wording
Full-range-of-motion resistance training does not consistently produce greater quadriceps hypertrophy than partial-range training in young, untrained men, as evidenced by similar muscle volume increases in two MRI-based studies and mixed results in ultrasound studies, suggesting a threshold effect beyond which additional ROM provides no added benefit.
What the research says
1 studyThis study found that doing full squats or leg exercises through the complete motion builds more muscle in the thighs than doing partial movements — the opposite of 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.