Origin and benefits of HIIT routine

http://www.empowernetwork.com/thepromisedland/blog/origin-and-benefits-of-hiit-routine/ The relatively modern HIIT routine fad is a movement based entirely on scientific research and experiments. HIIT, or High Intensity Interval Exercise, also sometimes referred to as HIIE (High Intensity Intermittent Exercise) is a type of exercise where the repetitions are done in quick succession and the exercises are high intensity, meaning the weight or speed is very high and the body will generally get a very quick cardio workout as a result.