Stand to the right of a 12 to 18 inch step or bench. Plant your left foot on the step and place your hands on your hips.(A) Press into your left foot, extend right leg, and spring up and over the step, (B) planting the right foot on the step and extending the left leg out into a side lunge. Immediately reverse the move, springing up and over to the right. Think of this move as your feet exchanging places on the step. Continue alternating for a full set. 10 to 12 reps per side
To make the move more challenging, hold a medicine ball.