Legs, cardio, upper body, and core are all a part of this summer workout! With one minute intervals of each, you'll be getting a total body workout in one sitting. Trust us, you'll be sore tomorrow - in a good way! Studio 5 Health and Fitness Contributor, Melanie Douglass, shares the details of this exercise routine. She shares how you can change it up for more variety, but still get the same benefits.