HOW: Begin in a standing position with a slider underneath one foot. Shift most of your weight to the leg without the slider. Perform a small squat by bending your knee and hinging forward at the hips while you slide your foot forwards, laterally, backwards. Return to the starting position in between each rep.
FEEL: You should feel your thigh muscles working in the leg that is squatting down.
COMPENSATION: Keep you back upright. Keep the knee that is sliding out straight.