Researchers say that regular exercise reduces the risk of getting a cold -- but only if it is not too vigorous, the Daily Mail reported.

Brisk walks every day can reduce your chance of catching a cold by up to 30 percent.

But prolonged strenuous activity could make you between two and six times more likely to succumb to upper respiratory infections.

Professor Mike Gleeson, an expert in biochemistry at Loughborough University, concluded from examining the last 10 years of research in this area that moderate exertion is best for the immune system.

(China.org.cn January 23, 2012)

據英國《每日郵報》報道，研究人員表示，日常鍛煉若不是太劇烈，可預防感冒。

每天快步走可使感冒幾率降低30%。

但運動時間太久、強度太大，上呼吸道感染概率則要擴大兩到六倍。

來自拉夫堡大學的生化學專家邁克·格里森教授，基于其在該領域過去十年的研究得出：適度運動最有利于免疫系統發揮作用。