How Many Miles a Week Should I Run?
How many weekly miles should I run to improve my health?
Surprisingly few, it seems. According to a new review of studies related to running and health, jogging for as few as five or six miles per week could substantially improve someone’s health.
The reviewers found that even with such skimpy mileage, runners generally weighed less and had a lower risk of obesity than people who jogged fewer than five miles per week or (more commonly) not at all. These runners also were less likely to experience high blood pressure, cholesterol problems, diabetes, strokes, certain cancers and arthritis than the barely- or nonrunners.
研究人员发现，尽管只有这么点里程，但是跑步者的体重普遍比那些跑的少或者根本不跑（更常见）的人低，而且有较低的肥胖风险。不仅如此，跑步者更不易患上高血压，高胆固醇，糖尿病，中风，癌症，关节炎等疾病。 纽约时报中英文网 http://www.qqenglish.com
“It seems like the maximum benefits of running occur at quite low doses,” said Dr. Carl J. Lavie, medical director of cardiac rehabilitation and prevention at the Ochsner Medical Center in New Orleans and lead author of the review, which was published in September in Mayo Clinic Proceedings.
“如果把跑步比作药剂，那么只要小小一剂，就能发挥最大的疗效，”新奥尔良奥克斯纳医疗中心(Ochsner Medical Center)心脏康复与预防科主任，同时也是该评论的作者之一，卡尔·J·李维博士说道。该评论9月份发表在《马友医学杂志》(Mayo Clinic Proceedings)。
As little as “one to two runs per week, or three to six miles per week, and well less than an hour per week” can be quite beneficial, he said.
Running a few additional miles each week could be worthwhile if you were worried about middle-aged spread, he said, because additional mileage is generally associated with better weight control, “and allows one to eat more calories.”
Someone hoping to become a better, faster runner also would need to run more than five or six miles a week, he said.
However, there may be an upper limit to the desirable mileage if your primary goal is improved health. Some evidence, he said, suggested that running strenuously for more than about an hour every day could slightly increase someone’s risks for heart problems, as well as for running-related injuries and disabilities.
Over all, Dr. Lavie says, the best advice based on the latest science is that for most of us, “running for 20 to 30 minutes, or about a mile-and-a-half to three miles, twice per week would appear to be perfect.”