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糖是人体最重要的供能物质,无论何种性质的运动,都要利用糖代谢供给能量,当可利用的糖耗竭时,才动用脂肪或蛋白质供给能量。运动中,肌肉摄取的糖量可达安静时的20倍或更多。糖供能具有以下优点:易氧化、且氧化完全,代谢终产物二氧化碳和水不会增加体液的酸度;在缺氧条件下,可通过无氧酵解供能;
Sugar is the body’s most important energy supply material, regardless of the nature of the exercise, must use the sugar metabolism to provide energy, when available sugar depletion, before using fat or protein to supply energy. During exercise, muscle uptake of sugar up to 20 times or more when quiet. Sugar has the following advantages: easy to oxidize, and complete oxidation, metabolic end products of carbon dioxide and water will not increase the body fluid acidity; in anaerobic conditions, can be fed by anaerobic glycolysis;