It combines strength and cardio into one total body sweat session.

If you only have 15 minutes to sweat, it's easy to skip out on a workout. I mean, how much can you really accomplish in 15 minutes, right? Umm, a lot, actually—if you spend them wisely. That's the ...

Circuit training. Body mass index. Set point theory. Range of motion. The terms associated with exercise and their theories could fill many volumes. And there are a few exercise enthusiasts who would ...