Stand with your feet staggered, your left foot slightly in front of your right. Making sure you're not too stiff, keep your stance active with your knees bent in a slight but not full lunge.
With your core engaged, push off the bottom of both feet into a jump, switching the position of your feet in midair, landing in a basic lunge with your right leg in front.
Without rest, repeat this movement, alternating which leg is in front. This completes one rep.