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)