HOW: Start by lying on your back. Keeping your core engaged, slowly lift only one leg away from the floor by bending your knee and bringing your heel towards your hips. The closer you get towards your hips, the harder the exercise will be.
FEEL: You shoulder feel your hamstring muscles behind your thigh working as you bend your knee towards your hip.
COMPENSATION: Do not arch your back. Keep your ribcage down and your core on.
