High intensity interval training (HIIT) is one of the most efficient and effective fat-burning and muscle-building workout routines you can do to train your body for maximum fitness. Also called HIIE (high intensity intermittent exercise) or SIT (sprint interval training), interval training works on your body in two ways simultaneously: 1) it burns and trims the fat and, 2) it promotes muscle gain and strength.
This visual guide demonstrates the science of HIIT and exactly what happens to your body during the training process. Here’s your way to gorgeously sculpted, lean and supremely strong body!
Infographic by – Greatist