Cardio may be boring, but at least you'll burn far more calories when you follow these 5 rules for making HIIT workouts vastly more effective.
March 11, 2015
Boost your natural hormone output and metabolism with this high-load training circuit. It's designed to build muscle while you strip away fat—no cardio required!
September 26, 2014
You don't always have to hop on the treadmill to fit in a good sweat session. Learn how to challenge your body, burn fat, and get fit with this killer HIIT routine!