plasma concentration is always recorded at the beginning of the exercise, followed by a fall below the normal basal level when the effort is prolonged. This adaptation represents an indispensable regulation at the muscular level. It allows the body to continue physical exercise, by promoting glycogenolysis (production of glucose from glycogen , and by facilitating the implementation of gluconeogenesis processes. (Glycogen synthesis. For bodybuilding practitioners and athletes the heavier the loads there .