What is High Intensity Interval Training?
HIIT is an acronym for High Intensity Interval Training. First implemented by Finnish Olympic long-distance runner Hannes Kolehmainen as part of his training in the 1920's. It is now commonly practiced in gyms.
Simply explained, HIIT differs from cardio and strength training by entwining any kind of repetitions. The alternative period of work is immediately followed by rest and so on for a definite time. Where cardio or endurance is non-stop motion and strength training is static, HIIT combines both, increasing intensity.
Exercise Timer is a customisable Interval Timer App that helps you perform HIIT workouts.