Mayo Clinic - High-intensity interval training, or HIIT, uses short bursts of high-energy exercise with cooldown periods between to maximize benefits and minimize workout time. Learn more about high intensity interval training
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Sports Performance Bulletin - High intensity training - Interval training: the long and short of rest between efforts
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Optimizing high-intensity intervals: superior physiological adaptations after a microcycle of short intervals versus long intervals – YLMSportScience
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