1. Spinning
Both cycling and spinning on a stationary bike can also be considered two of the most complete exercises around. Almost every muscular group in your body goes into motion during these activities, if performed correctly. In fact, at medium intensity, a 180-lb person can torch up to 580 calories in an hour, which increases to the mind-blowing amount of 700 calories during a 45-minute power session. Even though the presence of a personal trainer is advisable at the beginning, another big plus with this exercise is that it can obviously be performed indoors, even at home.