Autonomic nervous system, also known as vegetative nervous system and involuntary nervous system, is the peripheral nervous system of vertebrates, which differentiates and develops from somatic nerves to form a functionally independent nervous system, which can regulate the activities of visceral and vascular smooth muscle, myocardium and glands. Autonomic nervous system is composed of sympathetic nervous system and parasympathetic nervous system, which is divided into central part and peripheral part, which is mainly distributed in viscera, cardiovascular system and gland. the central part is in the brain and spinal cord, and the surrounding part includes visceral motor fibers and visceral sensory fibers, which constitute visceral motor nerve and visceral sensory nerve respectively.

Stimulants, also known as central nervous system stimulant, central nervous system stimulant, is the general name of a class of psychotropic drugs, including exciting drugs, drugs to enhance activity and so on. Stimulants can improve energy and concentration, but it can also increase blood pressure, heartbeat and breathing. Stimulants have always been regarded as banned drugs by the sports community. When athletes take stimulants, it will affect the fairness of the competition. It has been scientifically proved that doping can cause harm to people's physical and mental health, serious personality changes in physiology, drug dependence, abnormal function of cells and organs, and allergic reactions. damage immunity and cause a variety of infections.