HOW: Begin with your back resting against an elevated surface such as a bench. From this position, lift your hips up by pushing through your feet. With your hips elevated, bend your hip and lift one foot off of the ground. Return that foot to the ground and lift up the other leg performing a marching f motion. Perform for the prescribed amount of reps.
FEEL: You will feel your core, hip muscles, and hip flexors working as you perform this motion.
COMPENSATION: Keep your hips up as you perform this exercise, do not let them drop down.