She said having a cycling network would make cycling a "desirable choice, " with this a key time to get more people on a bike before the "Olympic buzz dwindles".

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"I generally need to be working in a space with other people, " said Mr. Ades, who said he often rides his bike to different workspaces.

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At first, our tours looked a lot like that first bike ride, with foreigners coming in to "serve" people in places they knew very little about.

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People in the exercise group started out with 36 supervised-exercise sessions, then were sent home with a treadmill or exercise bike and instructed to get 120 to 200 minutes of exercise a week.

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