Each of the activities below burns a substantial amount of calories in a limited amount of time, putting you well on your way towards burning the 3,500 calories needed to lose one pound of weight.
Browse the list, choose your workout and get ready to sweat.
You don't have to be the next Rocky to take up boxing. While it's not your standard bout in the ring, the competitive martial art of kickboxing burns serious calories, thanks to the high-intensity combination of punches, kicks and sparing.
A study by the American Council on Exercise (ACE) looked at four different types of kickboxing classes and found that women weighing an average of 135 pounds burned between 350 to 450 calories in an hour. If you ask us, that epic payoff is worth going a few rounds.