HIIT It Hard For 7 Days With These Sweat-Tastic Workouts

Ever heard of "too much of a good thing is still too much"? It applies in many areas, including our workouts. Working your body at high intensities for even short periods of time means your body needs time to recover. That doesn't mean you should lounge on the couch. How about letting your cardio system reboot for a day and take a shot at tightening your core? Resting every few days means you can HIIT it again the next day.