Exercise Physiology is the science that deals with the function of the body , both its organs and cells, which we know today as Cellular Physiology. Exercise physiologists are scientists who investigate people's responses and adaptations to muscle activity and use this knowledge to improve human performance. Exercise Physiology as a specialty Exercise Physiology is the medical specialty that includes the study and understanding of the body and its behavior during physical activity . In it, the immediate physiological responses of the body during exercise are analyzed, such as muscular reactions or the functioning of metabolism. In addition, other factors such as nutrition are studied, analyzing in detail what role they play and how they influence these behaviors. During physical activity or exercise, all the body's systems are automatically activated and in tune, and Exercise Physiology is concerned with studying the relationship between all these systems and how the body