Think working out has to be hard? Think again! HIIT workouts appear to do the impossible by helping you to burn more calories than a 40-minute run in a quarter of that time! Better yet, they also build muscle, improve athletic performance and give you more energy. They've been transforming the lives of people all around the world and if you want to achieve one of those `cover model physiques' then this is probably just what you're looking for.Ready to get started with the most highly effective and efficient workouts on the planet? Then let's get started! Along the way, we'll discover that there's a lot more to HIIT than just the basic alternating speeds; we'll learn some advanced techniques like cardio acceleration, fartlek training, speed drills, concurrent training, metcon, tabata, finishers and more.Let's HIIT it!