The cybex 525at total body arc trainer is a fantastic machine to use as a way of working on cardio strength and power this machine technically works as 3 machines in 1 as it offers such an extensive range of resistance and incline options there are 21 incline levels to workout in glide stride or climb option using them all and spending a decent amount of time on them will efficiently and effectively work different muscles around the body as well as increasing your endurance levels research