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BONN, GERMANY - OCTOBER 09: Portrait of a 75-year-old woman in a gym on October 09, 2014, in Bonn, Germany. The WHO recommends older adults to stay physically active in order to increase and maintain health. Photo by Ute Grabowsky/Photothek via Getty Images)***Local Caption***

BONN, GERMANY - OCTOBER 09: Portrait of a 75-year-old woman in a gym on October 09, 2014, in Bonn, Germany. The WHO recommends older adults to stay physically active in order to increase and maintain health. Photo by Ute Grabowsky/Photothek via Getty Images)***Local Caption***