No need to change your workout if you want to increase your calorie burn and decrease your size. Just try this trick: Do cardio before you strength train, say Drs. Oz and Roizen.

Doing your cardio first allows you to do your full workout without pooping out halfway because your legs are so exhausted. Plus, finishing your workout with weights helps boost that post-workout metabolism we all love so much. Do your workouts this way, and you'll achieve an overall higher calorie burn.

What if you only have time to choose either cardio or strength training? Well, then, pick the strength training, declare the good doctors. But don't stress about your choices too much, because any and all exercise is still good. If you have the time and luxury to pick and choose how you tailor your routine, though, give this advice a whirl and see how it works for you. Then come back and tell us what you think.