請把下麵的漢語翻譯成一句英文：
一項針對超重和肥胖人群的研究發現，該類人群罹患膝關節骨性關節炎的風險遠高於正常體重的人群，但體育鍛煉並不會增大這種風險。
參考答案：
A study of overweight and obese people found their risk of knee osteoarthritis was significantly higher than normal-weight individuals but exercise didn't increase that risk.
os·teo·ar·thri·tis /ˌɑ:stijowɑɚˈθraɪtəs/ noun
[noncount] medical: a disease that causes the joints to become very painful and stiff
obese /oʊˈbi:s/ adjective
[more obese; most obese] : very fat : fat in a way that is unhealthy
▪ providing medical treatment for obese patients
— obe·si·ty /oʊˈbi:səti/ noun [noncount]
▪ the problem of obesity in children
