Stability Ball Hip Abduction

Lie on one side on the stability ball with your legs extended straight out, feet stacked, hands on the ball.

Brace your core, squeeze your glutes and lift the upper leg as high as you can.

Hold at the top position, contracting your abductors and then slowly return the leg back to the starting position. The motion has to be only up and down, which means not to swing your leg forward or backwards.
Repeat for the recommended number of repetitions, then perform on the opposite side.