If you lift weights through a full movement range—like squatting all the way down and up—you’ll build bigger leg muscles than if you only half-squat, especially if you’re new to lifting and male.

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.

Doing hip thrusts or squats for nine weeks, with the same total amount of work, makes your butt muscles grow just as much—so neither exercise is clearly better for building glutes if you're new to lifting.

If older people who didn’t get stronger from doing just one set of weight exercises start doing four sets instead, their thigh muscles will grow bigger — and this was measured with a detailed scan.

If older women who’ve gone through menopause do more weight training sessions, they tend to gain more muscle mass than those who do fewer sessions.

If you're already strength-trained, doing full lifts (like fully curling a dumbbell) won't make your muscles grow more than just doing the stretchy part of the movement—so maybe stretching your muscles under load is the real secret to getting bigger.