—You'd better keep ___ more English books.
Fast walking is the exercise between walking and race walking. A study shows that fast walking has become the most popular exercise in China and many people walk more than 5 000 steps a day. The results of the study are from QQ users. About 37% of the people choose fast walking as their favourite exercise; over 23% choose running and more than 14% choose riding bikes.
Fast walking and running are easy, cost little and work well, so they are popular. And many people would rather do exercise in nature than go to gyms(健身房). It's best to walk fast for at least 10 minutes at a time and walk up to 6 000 steps every day.
The study also shows that people in Guiyang, Guizhou love sports most. On average(平均), everyone there walks 5 941 steps every day. It seems that people in places with better environment and air are more willing to(更愿意) do sports.
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