HOW: Start by lying face down on a stable surface. Slide your hips off of the table or bench. The front of your hips should be on the edge of the surface. Stabilize your upper body with your arms. Put your legs together and squeeze your glutes to bring your legs up and back down in a slow and controlled motion.
FEEL: You should feel your glute muscles working.
COMPENSATION: Don’t use your back too much, do not arch it as you bring your legs up.