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. This guide explores advanced HIIT techniques like cardio acceleration, fartlek training, speed drills, concurrent training, metcon, tabata, finishers and more.
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