Leg lifts
Lie on your stomach with your hands underneath your forehead and elbows bent out to the side. Have your legs stretched out behind you and turned out (rotated so your heels are touching and knees facing the sides).

Lift one leg as high as you can without taking your hips off the ground. Imagine you are lengthening your leg to touch the back wall and keep your knee straight. Hold for approximately five seconds, then lower.

Repeat 10 times with one leg, then swap.