To fire up your metabolism and shift fat burning into high gear, you don't need a ton of time. In fact, you can make it happen in as few as 10 minutes. Even better news: you can trigger this effect by strength training, running—even climbing stairs or pulling a sled. But, no matter which type of exercise you pick, the key is that you have to do it right (you must push to your max effort and get outside of your comfort zone.) These five varied routines are guaranteed to get you there.
Courtesy of Joel Sanders, trainer at EXOS.