Stand straight up in front of a bench or plyo box with feet about shoulder width apart holding one kettlebell in each hand on each side of you. Place the foot of one leg on bench. Stand on the bench by extending hip and knee of first leg, as you get to full extension of the hip and knee, place the foot of the second leg on bench. Step down with second leg by flexing hip and knee of first leg, then step down with the first leg as well, returning to the starting position. Repeat with the opposite leg initiating the exercises. Be sure to keep your torso upright, eyes straight ahead, and the knee should trace over the foot, and the core should stay tight throughout.