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SSS 2010-08-24

时间:2010-09-03 05:59来源:互联网 提供网友:yu6707   字体: [ ]
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Americans, and American physicians, are concerned about ballooning waistlines and the accompanying health problems. Now, researchers have presented the first randomized trial of what they hail as a side-effect-free, prescription-free, and simply free appetite control agent. That is, of course, water. Brenda Davy, lead researcher from Virginia Tech, presented the findings at the National Meeting of the American Chemical Society.

Previous studies showed that middle-aged1 and older Americans who drank two cups of water before a meal ate about 75 to 90 fewer calories over the course of the meal. For this study, the scientists took 48 adults between 55 and 75. All ate a low-calorie diet for 12 weeks. Half of the group drank 16 ounces of water before meals. The other half didn't.

After the 12 weeks were over, the water drinkers lost on average 15.5 pounds, while the ones who weren't prescribed water lost about 11 pounds. Davy says that this phenomena2 could occur because water is filling and has, of course, zero calories. It could also be displacing other, sweeter drinks that the dieters might consume. It's not a cure-all, but it's certainly a cheap and simple addition to any weight-loss plan.

Thanks for the minute. For Scientific American's 60-Second Science. I'm Cynthia Graber.
 


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1 middle-aged UopzSS     
adj.中年的
参考例句:
  • I noticed two middle-aged passengers.我注意到两个中年乘客。
  • The new skin balm was welcome by middle-aged women.这种新护肤香膏受到了中年妇女的欢迎。
2 phenomena 8N9xp     
n.现象
参考例句:
  • Ade couldn't relate the phenomena with any theory he knew.艾德无法用他所知道的任何理论来解释这种现象。
  • The object of these experiments was to find the connection,if any,between the two phenomena.这些实验的目的就是探索这两种现象之间的联系,如果存在着任何联系的话。
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