To begin this exercise position yourself in a lunge stance with one foot out behind you and one out in front of you.
Your back knee should almost touch the ground and the front thigh should almost be parallel to the floor. Your arms should be at your sides. From this position, launch your body up into the air, reversing the positions of your legs while simultaneously pushing your arms up and over your head.
Land in the lunge position with the foot that was in back now in front and vice-versa. Pause for a one-count and repeat.