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

据英国《每日邮报》报道，研究人员表示，日常锻炼若不是太剧烈，可预防感冒。

Brisk walks every day can reduce your chance of catching¹ a cold by up to 30 percent.

每天快步走可使感冒几率降低30%。

But prolonged strenuous² activity could make you between two and six times more likely to succumb³ to upper respiratory infections.

但运动时间太久、强度太大，上呼吸道感染概率则要扩大两到六倍。

Professor Mike Gleeson, an expert in biochemistry at Loughborough University, concluded from examining the last 10 years of research in this area that moderate exertion⁴ is best for the immune system.

来自拉夫堡大学的生化学专家迈克·格里森教授，基于其在该领域过去十年的研究得出：适度运动最有利于免疫系统发挥作用。