Clamshells

Muscles worked

You need

How to do it

1. Lie on your side with your head resting on your arm, knees bent and stacked, heels in line with your glutes.
2. Keeping your feet pressed together, lift your top knee up and open like a clamshell - as far as it will go without rolling your hips backward - then lower it back down with control.
3. The movement is small and the muscle it finds is one that squats and lunges tend to miss: the side of your hip, working quietly on every rep.
4. Complete your reps, then switch sides.