Side kicks and straight punches are the body's go-to weapons of mass destruction. They're also a great way to harness physical power, build coordination, improve balance and generate greater strength and speed. Combat HIIT Express, as the name suggests, takes you through basic punching and kicking routines at high intensity. It will make you fitter, stronger and more efficient in the way you move. Add EC to this one for a total VO2 Max challenge.