HIIT involves short bursts of high-intensity exercise interspersed with low-intensity periods devoted to recovery.
For example, a HIIT workout with a stationary bike may consist of 30 seconds of cycling as hard as you can on the highest resistance followed by 30 seconds or a minute of slow, easy cycling at low resistance to complete one “round”.
It is a highly efficient method for gaining results quickly (workouts are usually only 10 to 30 minutes long). Despite the short duration of HIIT workouts, they may produce health benefits that rival twice the amount of moderate-intensity exercise (more on that below).
Read on for all the latest research on the scientific benefits of high-intensity interval training.