糖是维持人体运动能力的主要能源物质。糖分为单糖、双糖和多糖。近年来,随着生物化学研究的不断发展,已证实自然界中有葡萄糖、果糖等200多种单糖。不同的糖,其代谢途径不同。糖元充填已证实能推迟耐久性运动疲劳的产生和提高耐久性运动能力。但是又有研究表明,赛前服用葡萄糖容易导致疲劳和运动能力下降。这是因为 Sugar is to maintain the body’s ability to exercise the main energy material. Sugar is divided into monosaccharides, disaccharides and polysaccharides. In recent years, with the continuous development of biochemical research, more than 200 kinds of monosaccharides, such as glucose and fructose, have been confirmed in nature. Different sugars, their metabolic pathways are different. Glycogen filling has been shown to delay the onset of durable exercise fatigue and improve endurance exercise capacity. However, studies have shown that pre-race glucose easily lead to fatigue and decreased exercise capacity. This is because