HOW: Start by getting a step set up in front of you. Place one leg up on top of the step. From here, shift your weight forward onto the leg on top of the box as you roll onto the toe of your back leg. Pause. From here push up through the leg on the box driving the opposite up into a 90 degree angle at the hip and the knee. Return back to the toe off position and then to the original starting position with the weight through your back leg. Return to the starting position and repeat.
FEEL: You should feel your leg and hip muscles working.
COMPENSATION: Make sure to shift your weight forwards before driving the knee up. Pause at each step of the exercise, do not rush through it.