The triathlon promises to be one of the most popular Olympic sports. Recently it has drawn huge crowds attracted (and worried) by athletes swimming 1500m, cycling 40km, and then running 10km without stopping. Great for those watching, maybe, but what makes the triathletes want to punish their bodies的翻译：什么意思？中文翻译英文，英文翻译中文，怎么说？

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铁人三项有望成为最流行的奥林匹克运动之一。最近，它已制定吸引和担心运动员游泳1500米，骑自行车40公里人山人海，然后运行而不停止10公里。看着那些伟大的，也许，但什么使得铁人三项要惩罚自己的身体这么%E