Make sure you're doing this super-hard exercise the right way. Then, crush some killer variations and a smart workout.

Add Yahoo as a preferred source to see more of our stories on Google. Burpees calorie burn illustration According to Harvard studies, a 125-pound person burns up to 240 calories every half hour ...

Doing burpees can help you increase strength and fitness. But exercises such as kettlebell swings, plank jacks, and bear crawls provide similar benefits with a much lower impact on your body. When you ...