Doing hip exercises through a shorter range of motion might build more glute and hamstring muscle than doing them through the full range.

If you stretch your hips back while doing leg extensions, your quad muscle gets longer and grows more—especially in the middle and upper parts—than if you do the exercise with your hips bent.

Doing only the bottom part of an exercise (where the muscle is stretched) can build as much muscle in your arms and legs as doing the full movement, as long as you put in the same amount of effort and work.

If women who don't usually work out do leg exercises through only part of the movement, they get stronger in just that part of the motion — and it doesn't help much with the rest of the movement.

If women who don't usually work out do certain leg exercises only through part of the movement—when the muscle is stretched—they might build more muscle in specific spots compared to doing the full movement or nothing at all.

Doing certain leg exercises that only use the last part of the movement doesn’t seem to help untrained women build muscle in specific parts of their thighs — it’s about the same as not exercising at all.