u003cbu003eGet the best results from your HIIT sessions by understanding the muscle action needed to perfect each exercise.u003c/bu003eu003cbru003eu003cbru003eExplore the physiology of all the essential HIIT exercises, spins, and sprints, to master each movement with confidence and control.u003cbru003e u003cbru003eRecent scientific research shows that HIIT is the most efficient form of exercise for raising fitness levels, increasing cardiopulmonary health, and losing weight.u003cbru003e u003cbru003eu003ciu003eScience of HIITu003c/iu003e reveals the facts, with annotated illustrations that show the mechanics, the angles, the key muscle and joint actions working below the surface of each exercise, safe alignment, and much more. u003cbru003e u003cbru003eLook no further to achieve technical excellence in your practice and develop your own program of varied workouts, to optimize the benefits of HIIT to your body and mind.