HOW: Get set-up with your hands supported on a wall with your elbows straight. While standing tall with a slight lean forward, lift on leg up driving your knee forward until your thigh is parallel to the ground. Hold this position, slowly lower down and repeat on the other side.
FEEL: You will feel your hip flexor muscles working on the side that you lifted the leg. You will also feel your core muscles working and your opposite hip muscles working to maintain balance and single limb stance stability.
COMPENSATION: Do not round or arch your back when you lift/lower your leg. Try to isolate hip movement during the exercise. See video for tips