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High-intensity interval training (HIIT) is a form of interval training, a cardiovascular exercise strategy alternating short periods of intense anaerobic exercise with less-intense recovery periods, until too exhausted to continue. HIIT is now widely acknowledged as the single most advantageous form of exercise for a wide range of fitness goals. When compared side by side to other forms of cardiovascular training With HIIT, you will achieve superior gains over other forms of training in all the following areas: Weight loss Improving the body's capacity to burn fat Increasing anaerobic threshold, enabling you to work harder before the burn sets in Improving maximal oxygen uptake (VO2 max), a popular indicator of fitness Improving athletic performance Releasing beta-endorphins, providing a feeling of well-being Exercise enjoyment And much more Fitness professionals, to help people enjoy their fitness journeys and stay committed as well, we must offer them a variety of workouts that are stimulating and time-efficient-and that's what HIIT delivers. By reading this book, you are giving yourself the gift of deeper insight into HIIT so that you are fully equipped to lead people on rewarding fitness journeys.