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一项针对超重和肥胖人群的研究发现，该类人群罹患膝关节骨性关节炎的风险远高于正常体重的人群，但体育锻炼并不会增大这种风险。

A research on overweight and fat group found that these people have higher risk of knee joint athritis than those of normal weight, but doing physical exercise does not add a bit to it.