Tired of cardio? ...Then do only 5min (5 min is just enought so it wont make you so bored you want to shoot youself in the head) on each machine, and do all machines at the gym one lap, or two... Im assuming they do have more machines then only one, more like 5... for example, rowing 5min, Treadmill 5min, Stairs 5min, Bike 5min... etc... After one another without any rest