How to Get a Great Interval Workout on Gym Cardio Machines
by Beth Skwarecki on Vitals, shared by Beth Skwarecki from Lifehacker on (#4T689)
You can do cardio intervals just about anywhere, as we're discovering during this month's fitness challenge: your living room is a classic, or you can hop on a bike or lace up your running shoes. But sometimes the simplest choice is to visit the gym and take your pick of the cardio equipment there.