WHAT IS HIIT?
High-Intensity Interval Training (HIIT), also called High-Intensity Intermittent Exercise (HIIE) or Sprint Interval Training (SIT), is a form of interval training that uses alternating periods of anaerobic exercise with recovery periods. These sessions can vary from four to 30 minutes and come with huge benefits, building muscle and speeding up your metabolism, burning fat, improving energy systems and turning you into a better all-round athlete. There are a number of kinds of HIIT, the famous ones are known as regimens (some examples are the Timmons regimen and the Peter Coe regimen) but the most popular is Tabata, created by Professor Izumi Tabata: 20 seconds of exercise followed by 10 seconds of rest, repeated eight times (which covers a total of four minutes). You can use this routine in almost any kind of training.