Begin by squatting down and placing your hands on the floor in front of you (about shoulder width apart). With your weight on your hands, kick your feet back, into a push up position, and lower yourself to the floor, keeping a straight line from head to heels. Now push up explosively. Remember not to let your back arch or hips sag, and keep a tight line, not letting your hips pike.
As you push up, perform a frog kick, bringing your feet towards your hands, and jump back up to the starting position, reaching your arms over your head. Bend your knees as you land and repeat for repetitions.