Steady-paced cardio sessions can get real boring, real fast. With intervals, the time flies by faster than a Cookie Monster can down an entire batch of fresh chocolate chip cookies.

Try these high intensity interval workouts back to back or on their own. (Each should last about 20 minutes.) Just make sure you “HIIT” em’ hard because High Intensity Interval Training works best when you take your sprints all the way to the edge of and a bit over your comfort zone!

P.S. Runners, feel free to adjust the treadmill speeds to meet your own level of fitness. Just make sure you’re challenging yourself and creating a “climb.”