Kristin Armstrong won Olympic gold in the cycling time trial the day before she turned 43. Tim de Waele/Corbis via Getty Images hide caption

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Olympic Athletes Prove That Older Doesn't Have To Mean Slower

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Japan's Kohei Uchimura performs on the horizontal bar during men's individual all-around final on Wednesday. Uchimura, widely considered to be the best male gymnast ever, repeated as the gold medalist in the event. Dmitri Lovetsky/AP hide caption

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Russian tennis star Maria Sharapova isn't competing at the 2016 Olympics. At a March 7 press conference in Los Angeles, she told reporters she'd tested positive for meldonium, a prescription heart drug that improves blood flow. It was banned in January by the World Anti-Doping Agency. Robyn Beck/AFP/Getty Images hide caption

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Olympic Athletes Still Use Some Rx Drugs As A Path To 'Legal Doping'

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Jaime Rangel helps Gustavo Ruiz, 12, align a tire on his bike, at a recent community event in southeast Fresno, Calif. As manager for Bici Projects, Rangel promotes cycling in the Latino community as a great way to get in shape. Farida Jhabvala Romero/KQED hide caption

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The Eastside Bicycle Club on a 35 mile Saturday evening ride with stops for tacos. Carlos Morales hide caption

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On A 'Tour De Tacos' With Los Angeles' Eastside Bike Club

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Britain's Chris Froome gestures to a teammate (right) after getting up from his third crash in two days. Froome, who hurt his wrist in Tuesday's fall, has abandoned the race that he won in 2013. Laurent Cipriani/AP hide caption

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The women of the Afghan National Cycling Federation team train outside Kabul, the capital. They face poor road conditions, terrible traffic, lots of gawking and even threats of violence in pursuit of their sport. Peter Breslow/NPR hide caption

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Afghan Female Cyclists: Breaking Away, And Breaking Taboos

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