We are busy, busy people—but I'll bet all of us can carve out seven minutes somewhere in our days, right? The newest issue of American College of Sports Medicine's Health & Fitness Journal takes all the
Celebrity trainer Gunnar Peterson — yup, the one who trains the Kardashians, Kate Beckinsale, and the Los Angeles Lakers — wants to help you improve your core workout and make it as effective as possible.
When we saw Kelsey Wells's 16-minute HIIT workout, we knew it was going to be legit. It's perfect for those days when you have no idea what to do at the gym, you want to work out at home, or you've got