Walking with quick steps for just 2.5 hours a week could add more than 7 years to your life, a recent research conducted by the US government's medical research agency and Harvard University shows, foreign media reported.
据外媒报道，美国政府医学研究机构与哈佛大学一项最新研究显示，每周快走两个半小时即可延年益寿7年多。
Even half of that is beneficial,with 75 minutes of brisk walking a week enough to extend life by almost 2 years.
即使时间减半，每周快走75分钟，也足以延长寿命两年左右。
The study also found that people of a healthy weight who didn't exercise could expect to die 3.1 years earlier than obese people who did stay active.
这项研究还指出，与积极运动的胖子相比，体重正常的人若不爱运动，死亡会提前3.1年。
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