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糖类物质是人们日常生活膳食的主要成份,其主要功能是为人的生命活动提供能量.剧烈运动时,能量需求大增而往往氧的供给相对不足,如果剧烈的运动时间过长,人体内储备的糖原被大量消耗,血糖浓度就会下降,则首先导致大脑神经细胞产生保护性抑制(疲劳),肌肉收缩能量来源枯竭,由于大量动用脂肪,增加肝脏和呼吸系统的负担,过早产生运动性疲劳,从而使竞技能力下降。在1924年波土顿马拉松赛跑后,有人[1]即刻测试了运动员的
The main function of carbohydrates is the dietary composition of people’s daily life, its main function is to provide energy for human life activities.When strenuous exercise, the energy demand increased oxygen supply is often relatively inadequate, if the intense exercise time is too long, the human body reserves Of the glycogen is consumed in large quantities and the blood sugar concentration is decreased, first of all, protective inhibition (fatigue) occurs in the brain neurons, the source of muscle contraction energy is depleted, exercise is premature due to extensive use of fat, increase in the liver and respiratory system burden Sexual fatigue, so that the competitive ability to decline. After the Potomac marathon in 1924, some [1] tested the athletes immediately