If you want to reduce the frequency and severity of symptoms of colds you should do exercise at least five times a week and remain physically fit, US researchers report in the British Journal of Sports Medicine. They stress that not only do fit people have much fewer colds, but also when they do their symptoms are significantly milder compared to those who do not work out regularly.

Researchers from North Carolina, USA, monitored upper respiratory tract infection frequency and symptom severity over a 12-week period during autumn/winter in 2008 on 1,000 individuals aged 18 to 85. 60% of them were female and 40% were aged 19 to 39. 25% of them were over sixty years of age while 40% were middle aged.

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