HIIT. Sure, you have probably heard some rumblings about adding HIIT to your workouts. But what exactly is HIIT? HIIT, or high-intensity interval training, is touted as one of the most effective fat burning tools out there. Incorporate some HIIT to a few workouts per week, and you will not only burn large amounts of calories, but feel your cardio endurance get much longer and stronger. This pin from Greatist.com is one of the best pins I have ever found on Pinterest. This chart explains the science behind high-intensity interval training and exactly how to add it into your weekly workouts. Try it with your next workout and explore Pinterest for more HIIT options.