This text is an essential resource for any practitioner interested in how muscles work, whether from the point of view of training for sport, treating physical problems and diseases, or understanding the basic cellular physiology and how the function interrelates with other body systems. It provides outstanding material on skeletal muscle physiology and biochemistry. The book also offers the reader important knowledge on topics like embryonic development, muscle organization, energy metabolism, structure of the muscle fiber, and mechanisms of fatigue.