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1 交感、肾上腺系统的兴奋性在运动中的变化及其意义1.1 运动中神经系统对心血管反应的调节作用在一定强度的运动中,对心血管系统起主要调节作用的是植物神经系统。运动一开始,由运动肌肉的传入冲动通过中枢神经系统,根据相应的负荷水平,使交感肾上腺系统兴奋,从而使心血管、激素及代谢的反应增强,进一步影响到体温调节,水电解质平衡,肌肉的收缩性能等。从而保证全身器官与组织的血液灌流、氧及营养物质的供应及代谢产物的排除以保持
1 Sympathetic and adrenal system excitability changes in the exercise and its significance 1.1 Nervous system during exercise regulation of cardiovascular response In a certain intensity of exercise, the cardiovascular system plays a major regulatory role in the autonomic nervous system. At the beginning of the exercise, afferent movement of the muscles through the central nervous system, according to the corresponding load level, the sympathetic adrenal system excited, so that the cardiovascular, hormonal and metabolic response, and further affect the body temperature regulation, water and electrolyte balance, Muscle contraction and so on. So as to ensure that the body organs and tissues of the blood perfusion, oxygen and nutrient supply and the exclusion of metabolites to maintain