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 or skilled actions that we come to expect in 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).
