A HIIT workout is characterised by short periods of all-out exercise, interspersed with rest or active recovery sessions. — Photos: 123rf.com Ever since the study High-Intensity Circuit Training Using Body Weight: Maximum Results With Minimal Investment was published in the American College of Sports Medicine’s Health and Fitness Journal in 2013, the fitness industry has moved up a notch. Thanks to the authors and exercise scientists Brett Klika and Chris Jordan, who gave a sample workout consisting of 12 exercises to be performed in seven minutes, there has been an explosion of similar workouts all over the world. Lately, more gyms and health and wellness centres worldwide have begun spicing all kinds of workouts up with HIIT – there’s HIIT yoga, HIIT Pilates, HIIT swimming, HIIT skipping, HIIT glutes and abs, etc. For the uninitiated, HIIT is a training technique where you exercise all-out for very short periods of time, giving 100% effort through quick, intense bursts of exercise, followed by a short rest or active recovery period, before working hard again. An entire HIIT session usually lasts for about 10 to 30 minutes. It’s simply impossible to go beyond that if you’re rea...