Which Exercise Burns the Most Calories? Here's What Science Says

Your time is precious — and limited. So when it comes to working out, it's not uncommon to wonder: what exercise burns the most calories?

Exercise scientists have rigorously studied the amount of energy people expend during different types of exercise, and they've determined which workouts are best for burning calories. The thing to keep in mind: the more muscles you engage and the harder (and longer) you push those muscles, the more energy your body will churn through, says Dr.