The precise effects vary according to whether you engage in short, fast running or long-distance running.

确切的效果取决于你是短程快跑还是长程跑步。

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Find a new route, try speed running or long distance running, do intervals, run with or without music.

找一条新的路线，试试快速跑或者长距离跑，间歇跑，听音乐跑或者不听音乐跑。

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Kenya excelled in long distance running events but also took gold and silver in the women's 800 meters.

肯尼亚不仅在长跑项目中表现优异，也在800米赛女子项目中夺得金牌和银牌。

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More races mean more athletic children think of pursuing long distance running, especially in places like South America and China, where the sport still has significant room to grow.

WSJ: Breaking the Two-Hour Marathon Barrier

Unseen, though, was another opponent: Prefontaine, whose presence decades after his death on May 30, 1975, at the age of 24, has loomed large over long distance running in the United States.

CNN: Chasing Prefontaine: The run for a record

Fans who follow long-distance running are already familiar with Kenya's legendary success in the sport.

CNN: 'Kenyans' leads list of great running reads