Jogging may help protect eyesight 慢跑有助于保护视力

简介：
The exercise is found to decrease the risk of macular degeneration and cataracts in two studies of regular runners.
针对经常跑步的人所做的两项调查显示运动可以降低视网膜黄斑变性和白内障的风险性。
By Jeannine Stein
February 16, 2009
作者：Jeannine Stein

In two new analyses based on the National Runners' Health Study, one found that people who ran an average of 2 to 4 kilometers a day (1 mile equals 1.6 kilometers) had a 19% decrease in their risk of age-related macular degeneration, when compared with people who ran less than 2 kilometers per day. Those who ran more than 4 kilometers per day had a 42% to 54% decrease in risk.
由国际跑步健康协会提供的两份新的分析，一份显示平均每天跑2至4千米（一里相当于1.6千米）的人发生与年龄相应的视网膜黄斑变性的风险性比那些每天跑少于2千米的要低19%。而每天跑步多于4千米的人风险性要低42%至54%。
The other analysis found that men who ran 64 or more kilometers a week had a 35% lower cataract risk than those who ran less than 16 kilometers per week. Paul T. Williams, a staff scientist with the U.S. Department of Energy's Lawrence Berkeley National Laboratory and author of both studies, believes that exercise could provide similar protective benefits for the eyes as it does for the heart and other systems.
There are overlaps," he says.
另一份分析指出一周跑64 千米或者更多的人比那些少于16千米的人，患白内障的风险性低35%。保罗T•威廉姆（PaulT•Williams）,一位来自美国能源部的劳伦斯伯克力国家实验室的科学家，和两份研究的作者，相信运动对眼睛有保护的作用，正像对心脏和其他系统所起的作用那样，有多重作用，他说。
The study appeared in January's Investigative Ophthalmology & Visual Science.
这份研究发表在2月份的《眼科和视觉科学》杂志上。

jeannine.s tein@latimes.com