Dr. Rania Mekary, a Harvard Researcher, shares her findings on a 12 year study in which she sought to find which was better for the waist circumferance: weight training or cardio?

Also learn more about natural muscle loss and how to prevent it. Why working out causes you to eat more? And what is the best way to test your body for improvements?

Corinna Coffin isn't your normal college senior. She placed 2nd in the World Spartan Race Championship after being in the sport for less than a year. 

A true athlete with the coolest personality, Corinna opens up about her training, nutrition, boyfriend and more. It's like sitting down to coffee to catch up with a friend.