HIIT is a form of exercise where you alternate between short periods of vigorous effort (77 to 93 percent of your maximum heart rate, if you’re counting) and easier recovery periods. It can take about 48 hours for your muscles to recover properly after a HIIT workout ," Uria says. High-intensity interval training (AKA “HIIT”) has been a popular training method for years. This type of intense training causes a sort of metabolic disturbance which can result in the body burning calories at a higher rate up to 48-72 hours later. In short, it's one of the best ways to burn body fat and maintain lean muscle. Consider aerobic interval training, sometimes called high-intensity interval training (HIIT). What is HIIT? High Intensity Interval Training (HIIT) is a workout based primarily on aerobic exercise that can be done just about anywhere and at any time. That means HIIT workouts are any workout where you do something with all out effort for a set amount of time followed by a period of low intensity or rest for another specified amount of time. With the promise of faster weight loss and toning in shorter intervals, the appeal of HIIT is obvious. Everyone wants a beach body without sacrificing time. But, as time has gone on, the methods you see being labeled as “HIIT” are getting farther away from the science that proved the effectiveness of these types of routines. It stands for delayed onset muscle soreness. " High-Intensity Interval Training (HIIT) is a big trend in exercise and fitness this year. High-intensity interval training (HIIT) is a cardiorespiratory training technique that involves short bursts of intense exercise followed by even shorter rest periods. The period … Once the domain of elite athletes, interval training has become a … HIIT is any form of exercise that consists of a short burst of intense exercise that precedes a period of rest or low intensity exercise. And with many HIIT workouts averaging just 12-20 minutes, the time saved is considerable. The name gives away the secret to its success …the intensity MUST be high to … This type of training gets and keeps your heart rate up and burns more fat in less time. You repeat these intervals until time is up. High intensity interval training or HIIT is defined as short, intense, unsustainable bursts of physical activity, paired with intervals of quick rests. HIIT stands for high-intensity interval training, which refers to the short bursts of intense exercise alternated with low-intensity recovery periods that make up the protocol. First things first, HIIT stands for High Intensity Interval Training. 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