HOW: Start by lying on your stomach with a band between your ankles. 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 butt, the harder the exercise will be. Do not let the foot holding the band on the floor move!
FEEL: You shoulder feel your hamstring muscles behind your thigh working as you bend your knee towards your butt.
COMPENSATION: Do not arch your back. Keep your ribcage down and your core on.