Interval training, as we've noted quite a few times, is a great way to get fit in a short amount of time. High-intensity interval training (HIIT), as the name suggests, is even more intense and effective for burning fat. Here's a complete guide to HIIT workouts in one handy infographic.
Created by the folks at Greatist, the infographic describes how high-intensity training works your body to the highest amount of oxygen use and results in the "afterburn" effect, so your body keeps burning calories after the workout. Combining this with the principles of interval training, you can build lean muscle and boost your metabolism.
The graphic also compares three popular interval training programs so you can choose the right one for you: Tabata Method, Little Method and Turbulence Training. Note that high-intensity interval training isn't for everyone, as the graphic states, since it's taxing on the body and the programs mentioned here require dedication from people who are at least at the intermediate level of fitness.
If that's you, here's the guide to HIIT: