While some celebrities like to say that they are genetically blessed with a high metabolism, many other stars admit to working hard to stay in shape. Trainers, nutritionists, strict training schedules and diets—being a celebrity is a full time job when it comes to maintaining appearances.However, sometimes, movie and music stars are required to get into shape and slim down quickly for an upcoming audition, tour, or red carpet event. Often, this is when celebrities turn to high-intensity interval training.Image courtesy of hin255 / FreeDigitalPhotos.netWhat Is High-Intensity Interval Training?High-intensity interval training, or HIIT, is considered a form of cardiovascular exercise, geared towards torching calories and fat. It can help tone, and may help musculature seem more defined by melting off the layer of subcutaneous fat; however, it is unlikely to build significant amounts of muscle.HIIT alternates short bursts of high intensity work with slightly longer rest periods. High intensity means anywhere from 80% to maximum capacity for 30 seconds.
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