So I would say I was generally as fit as your average office working mountain biker, when going is good and commitments allow. I would be night riding every week, gym once a week for weights and the weekend riding 1-2 times a month. I do find I build much more fitness in the summer months as many of us do, I arn't naturally fit and sporty I have to work at it, and equally I have to exercise to maintain my weight.
So last year Sept / Oct time I had done some good riding, mainly on a night and got faster than previous years, and also backed by a solid year in the gym. So I decided to try and up my game during the winter, this is mainly in the form of lunchtime runs at work, anything from 3-6 miles currently and usually 3-4 times a week. However just as I start to progress I end up getting ill, since January I have had 3 colds and sinusitus. The general advice seems to be I am trying to do to much, I haven't lost much weight, I am eating more in order to maintain energy. So what can I do, I am getting really frustrated with it all now. Especially all these lazy folk around me who arn't ill all the time.
Any suggestions or tips welcomed.