【科学60秒】挤公交能瘦身_英语听力练习mp3下载-健康-沪江听力酷

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【科学60秒】挤公交能瘦身

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City planners and citizens alike frequently ____1____ better public transportation. They argue that it can lessen traffic and reduce emissions from cars. Now there's a new reason to be gung-ho about public transit - it helps make people skinnier. That's according to a study published in the August issue of the American Journal of Preventive Medicine.
Researchers surveyed communities in Charlotte, North Carolina. One survey was done before the city had finished building a new light rail system, and the second was done from 12 to 18 months after the rail's completion. They asked about the residents' level of physical activity, ____2____ and use of public transportation before and after the light rail.
Turns out that people who started using light rail to ____3____ had a significant average weight loss over that time - ____4____ about six and a half pounds for a five-foot-five person. The users were also 81 percent less likely to become obese over the time scale surveyed.
The researchers say that an environment based on ____5____ influences health, because rail users are get exercise ____6____ stops. And since illness is costly, here's another way public transit saves money.