The hallmark of HIIT is repeated bouts of extremely hard work interspersed with periods of recovery. During your work intervals, you’ll be pushing yourself nearly to your max, Noam Tamir, CSCS, ...
This article explores Barry's Bootcamp, the intense HIIT workout favored by supermodels and celebrities. It details the class format—a 50/50 split between treadmill interval cardio and floor strength ...