A woman wearing a face mask exercises at a park in Beijing on August 18, 2014. A report in local media in 2013 said that China's young adults are gaining more weight and exercising less than their elders, underscoring the fast-developing country's growing struggle with modern health problems. Just over half -- 51 percent -- of people between the ages of 20 and 39 did not exercise regularly, making them the country's "least active" adults, it was reported. AFP PHOTO / WANG ZHAO (Photo credit should read WANG ZHAO/AFP via Getty Images)
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AFP WANG ZHAO