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Ron Alford shows his bike app called 'Strava' that allows cyclists to... ニュース写真アメリカ合州国,サイクリング,ヒューマンインタレスト,メリーランド州,モバイルアプリ,旅,横長,自転車,見るPhotographer Collection: The Washington Post 2013 The Washington PostGREENBELT, MD- JANUARY 11: Ron Alford shows his bike app called 'Strava' that allows cyclists to easily see how much/what routes others are doing on Friday, January 11, 2013. Alford is a bike commuter participating in a friendly competition called 'Freezing Saddles' to see who can put in the most miles this winter. (Photo by Tracy A. Woodward/The Washington Post via Getty Images)