The treadmill is a keystone piece of exercise equipment, but sometimes walking or running on a treadmill can start to feel a little tedious. After all, you're not technically going anywhere. That's why we love treadmill workout videos, which prescribe a workout for you and often include music that you can follow along to. It's like having a coach or being in a workout class, while still getting your run in. These workouts range from intense HIIT routines to walking workouts that can still help you break a sweat. We rounded up some of our favorites to help you get started!