But nobody makes you ride a bicycle.

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It is autumn in Boston -- and a perfect day for a bicycle ride.

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Google cofounder Sergey Brin, who has overseen the development of Glass, dropped into the press briefing wearing Glass after a bicycle ride.

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He lived on paved, lighted city streets, and a bicycle ride away were the Asian drugstore and the Armenian grocery store and the corner where black Cubans drank coffee and talked Dodgers baseball.

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In 1997 she spearheaded efforts to provide pro bono legal counsel for a group of more than 100 San Francisco bicycle activists who organized a mass ride.

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"I used to ride my bicycle round it when I was a kid, " Lella, who is 39, told me as she served me tea.

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Her bicycle, which she had barely had a chance to ride in Washington, was strapped to the roof.

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Inside the vehicle, Driggers felt instantly at ease, as if he were getting on a bicycle again, this time with a much more comfortable ride.

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The future impact this could have on life spans, health and health care costs as more and more people are able to ride and get the benefits of exercise from improved bicycle engineering, can have a powerful affect on many industries and socio-economic classes.

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Biking in the United States is treated primarily as a leisure activity, with 73 percent of cyclists telling the National Bicycle Dealers Association (NBDA) they ride for recreation.

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