BIOCHEMICAL FOUNDATIONS OF ATHLETES' PHYSICAL QUALITIES MANIFESTED DURING MUSCULAR ACTIVITY

Abstract

The physical qualities of an athlete manifested during muscular activity (strength, speed, velocity, power, endurance, etc.) depend on the biochemical, physiological, morphological, and genetic characteristics of the individual, as well as the specifics of their psychological, technical, and tactical preparedness. The force developed by a single muscle fiber is directly dependent on the content of contractile proteins within it: the total amount of actin and the degree of myosin polymerization. In other words, the magnitude of the effort generated in a contracting muscle is directly proportional to the number of cross-bridges between actin and myosin filaments within each sarcomere comprising the myofibrils.