Ive been riding over the last three months and Ive had 3 colds. Dont know if its the same one that has never gone away or what. Its driving me nuts. Nothing strenuous just 10-15 miles a day 4-5 days a week. I have no fever or chest congestion. Its been cold in the AM when I ride (by SD standards) 36-45 degrees. Thinking about taking a few days off and see if that helps. Ive been sick more in the last 3 months than I have in the last 3 years. The only thing Im doing different is eating better and riding this year over the past. Go figure... So I guess its up to your own system if its the best thing for you. Theoretically I should be healthier this year but its not working out that way.