Whether you are just getting started in the world of fitness or have been around for a while, you have probably heard about high-intensity interval training, or HIIT. HIIT is designed to burn fat in a very short period, lasting anywhere from 3 to 60 minutes. A HIIT workout alternates between high and low-intensity exercises — known as rest periods — for a particular time. With this in mind, you are probably wondering, “how long should my HIIT workouts be? Well, the answer depends on a few different factors, so let’s take a look at what you need to know: