ABSTRACT
The muscles of the body are critical to almost every form of human behavior. In fact, without muscle activity there would be no observable behavior. Albert Szent-Gyorgyi, who worked on muscle biochemistry, was fascinated by muscle activity. In his own words: "Muscular contraction is one of the most wonderful phenomena of the biological kingdom. That a soft jelly should suddenly become hard, change its shape and lift a thousand times its own weight, and that it should be able to do so several hundred times a second, is little short of miraculous" (McElroy, 1988, p. 82).
