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Endurance athletes such as runners and cyclists are used to hearing injunctions to drink enough water. While staying hydrated is important, there are times when you can have too much water. 跑步和自行车等耐力运动的运动员已习惯于听到要补充足够水分的劝告。尽管保持身体有足够水分很重要，但有时候你可能会摄入过多的水分。 Last summer, for example, I began experiencing unusual muscle cramping in my hands and legs long after I finished a run, even the next day. Following the usual advice, I increased my water intake and ate bananas, which are full of potassium. That did not fix the problem. I then heard Jordan Metzl, a sports medicine specialist at the Hospital for Special Surgery in New York, describe how he had nearly crashed during his first Ironman race. It was a hot day, Dr Metzl recalled, and he was saved by a bearded bystander who was handing out raw salt. 比如，去年夏天，我开始在跑完步很长时间后（乃至第二天）出现手部和腿部肌肉痉挛。我遵循一般的建议增加了水分摄入，吃富含钾的香蕉。然而问题没有解决。之后我听了纽约特殊外科医院(Hospital for Special Surgery)运动医学专家约尔丹•梅茨尔博士(Jordan Metzl)讲述他在第一次参加铁人三项赛时差点晕倒的事情。梅茨尔回忆，那天天气炎热，一个蓄着胡须、正在分发粗盐的旁观者救了他。 | 
