“这是一项相当聪明,也很精彩的研究,”康涅狄格大学的补水专家、即将卸任的美国运动医学会主席劳伦斯•阿姆斯特朗表示。“它假定水为最理想的补水液体——从生物学角度而言的确如此——然后再将其他液体与水作比较。”
Why is milk so efficient at rehydration? “Normally when you drink, it signals the kidneys to get rid of the extra water by producing more urine,” Dr. Maughan said. “However, when beverages contain nutrients and electrolytes like sodium and potassium, as milk does, the stomach empties more slowly with a less dramatic effect on the kidneys.”
牛奶高效补水的原理是什么?“通常当你摄取水分时,肾脏会收到通过产生尿液来排出多余水分的指令,”莫恩博士说道,“但是若你饮用的液体含有营养成分和诸如钠和钾这样的电解质,比如饮用牛奶,那么胃的排空速率就会变慢,肾脏因此收到的指令变弱。”
Perhaps surprisingly, drinks containing moderate amounts of caffeine and alcohol or high levels of sugar had hydration indexes no different from water. In other words, coffee and beer are not dehydrating, despite common beliefs to the contrary, and regular soda can hydrate you just as well as water.
让人大感意外的是,含适量咖啡因、酒精或含糖高的饮料与普通水的补水指数相当。换句话来说,饮用咖啡和啤酒不易脱水,虽然这与人们的常识相左。同时,苏打水能和普通水一样带来同样的补水效果。
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