質疑：一天要喝八杯水嗎？
[ 2007-05-18 10:36 ]
一直以來，人們都被建議每天至少要喝八杯水，這樣才能保證身體健康。真的是這樣嗎？一份新的研究提出了不同的觀點，即一個人的飲水量應該根據自身的需要而定。
 If you're confused about how much water you really
need, I'm not surprised. Conflicting advice in recent headlines appears to
contradict the old "8-a-day" advice we all grew up with. Is it necessary to chug
down eight glasses of water daily, or is this recommendation exaggerated and out
of date?
We've heard for years that eight glasses of water daily is the minimum
necessary to keep healthy. Your weight loss and health depend on it. Drink the
minimum and see clearer skin, better sleep, better sex, improved vision. We're
warned of impending dehydration without at least eight glasses. But, the tide
has turned, away from liquid nutrition toward examining your daily diet,
including what you eat, as well as what you drink.
The answer is... you need what you need! If it's summer, you need more. If
you're exercising, you need more. If you're a "normal" sedentary person, who's
not perspiring, and not exercising more than 15-20 minutes daily, Dr. Heinz
Valtin of Dartmouth Medical School says you need no more than four glasses of
water daily. Most beverages can be counted as part of your daily fluid intake.
Although the World Health Organization recommends that everyone drink a minimum
of two liters of water daily, or about eight cups, the old "8X8" rule is based
on studies performed on people under extraordinary circumstances; including
soldiers at high altitude and hospitalized patients -- what you and I need is
different.
（來源：競學網 實習生江巍 英語點津 Annabel 編輯）
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