The Claim
Isometric training at long muscle lengths and full range of motion isotonic training produce similar overall quadriceps femoris hypertrophy in resistance-trained individuals, with no meaningful difference in summed anterior thigh muscle thickness between the two methods.
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.
If you train your quads using either holding a static position with your legs stretched out or doing full squat-like movements, both ways build your thigh muscles about the same amount — neither one is better than the other.
See the scientific wording
Isometric training at long muscle lengths and full range of motion isotonic training produce similar overall quadriceps femoris hypertrophy in resistance-trained individuals, with no meaningful difference in summed anterior thigh muscle thickness between the two methods.
When muscles are stretched and held under tension, the fibers experience strong physical stress that triggers the building of new muscle proteins, leading to thicker muscle fibers. This happens whether the muscle is pushed to its full length while holding still or while moving through a full range of motion.
What the research says
1 studyBoth holding your leg straight out and doing full squats built your thigh muscles about the same amount—neither way was clearly better than the other.
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.