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在运动时,骨骼肌的收缩迫使代谢性需要增高,这就需要通过氧及酶解物供应的增加,以支持运动的肌肉。心血管系统是供给代谢性酶解物及运走代谢性终末产物的主要通路。本文将论述心血管系统对运动时代谢性需要增高的支持反应。一个训练有素的人,工作肌肉的代谢率可增至安静时的20倍。根据肌肉工作的类型及从事运动的种类,这种代谢率的增加全部或大部分是由于肌肉内或肌肉外储存的碳水化合物及脂肪有氧代谢的增加。碳水化合物及脂肪的有氧代谢(氧化)直到运动第二分钟,才比其他能源更突出;无氧代谢(醣分解)从运动后第30秒至第90秒是主要的能源,并在整个运动期间继续以低的比率进行,如果运动强度超过肌肉的有氧代谢的能
During exercise, the contraction of skeletal muscle forces the metabolic needs to be increased, which requires the supply of oxygen and hydrolyzate to be increased to support the exercise muscles. The cardiovascular system is the main pathway that supplies metabolic enzymes and carries metabolic end products. This article discusses the supportive response of the cardiovascular system to increased metabolic needs during exercise. A well-trained person can increase the metabolic rate of working muscles to 20 times that of a resting person. Depending on the type of muscle work and type of exercise, this increase in metabolic rate is due, in whole or in part, to the increased carbohydrate and lipid aerobic metabolism stored in or outside the muscle. Carbohydrate and fat aerobic metabolism (oxidation) until the second minute of exercise, more prominent than other energy sources; anaerobic metabolism (sugar decomposition) from 30 seconds to 90 seconds after exercise is the main energy source, and in the whole movement During the continuation of the low rate, if the exercise intensity exceeds the muscle’s aerobic metabolism energy