Hip flexor lifts – single leg

Seated on the ground with your legs straddled (apart), put one hand on the ground on either side of one leg – that is your working leg. Keeping your back straight lift the working leg off the ground repeatedly keeping the leg straight (no knee bend). To increase the challenge walk your hands closer to your knees / feet. To decrease the challenge, put your hands on the ground behind your back, still working one leg at a time.