HOW: In a standing position, start by bringing one knee up as high as you can tolerate(hip level is as high as you need to go). Push off with your toes on the opposite leg to drive the other knee up. Alternate pushing off with each foot and bringing each knee up as quick and controlled as your can.
FEEL: You should feel the muscles in your hips, thigh, and calves working.
COMPENSATION: Stay straight up. Engage your core to keep your back straight, don’t slouch forward or lean back. Stay in the same place while alternating to each leg, don’t move forward.