HIIT stands for high-intensity interval training, including short bursts of intense exercises alternated with low-intensity recovery periods. HIIT is a quick and time-efficient way to exercise and burn calories. Even if you only have 5 minutes to spare, you can do an effective HIIT workout anywhere. It contributes to heart health, fat loss and strength gain and builds muscles than any traditional cardio and strength training. It helps to increase your metabolism. It is quick and convenient, and no equipment is needed during this HIIT.