“铁人”三项运动是在规定的时间内依次连续完成游泳、自行车、长跑共计41km的超极限运动。由于室外游泳水温要求在25℃±,所以赛事一般多在夏季举行。夏季气候炎热,日晒加之超极限的剧烈运动,使运动员大量出汗,体液丢失严重,极易引起脱水。因此在运动前、运动中、运动后及时补充液体就显得十分重要。 体液:包括细胞内液、细胞外液。体液有助于能量物质的合成与分解,运送养料、氧气并带走废物。在运动中肌肉的收缩产生的热量可由体液带到皮肤,再通过出汗来调节体温。 一、运动员的水代谢 剧烈运动时体热增加,在热环境下进行运动时体内产热增多,运动员主要以排汗调节体热平衡。不同项目 The “Triathlon” sports are 41km ultra-extreme sports in which swimming, cycling and long-distance running are completed in succession within a prescribed time. Due to outdoor swimming temperature requirements at 25 ℃ ±, so the event is generally held in the summer. Summer hot weather, combined with extreme sun and strenuous exercise, so that athletes sweat a lot, the loss of serious fluid can easily lead to dehydration. Therefore, before exercise, exercise, timely replenishment after exercise is very important. Body fluid: including intracellular fluid, extracellular fluid. Body fluids help in the synthesis and breakdown of energy substances, transporting nourishment, oxygen and taking away waste. During exercise, the heat generated by muscle contraction can be brought to the skin by body fluids, and then sweat to regulate body temperature. First, the athlete’s water metabolism During vigorous exercise, body heat increased during exercise in a hot environment increased body heat, mainly athletes heat regulating body heat balance. Different items