The common ‘cold’ is a virus and is so called as it was assumed in the olden days to have been caused by exposure to inclement weather. This is unproven.
If cold weather was the cause, there would be no work in places like Alaska due to infection. The reason why colds are more prevalent in winter is as yet, unproven. However, there are several theories including suggested social factors and that people spend longer indoors together, cross infecting each other. That’s right… it could be STAYING IN that’s giving you your cold. Your outdoor training is PROVEN to boost your immune system to help fight your cold. Train well, eat well, survive winter! Now, Man-flu…. that stuff is deadly.