It seems kinda scary when you have a real sore throat and are breathing heavy, then you go out in 15 degree F weather and are breathing hard while riding a bike for 2 hours. I am 61 I dont do that type of thing anymore. Ill take the 4 days off in a row. Just ride 2 times that week instead of the 5 to 6 times a week I have been riding all winter. That happened to me 2 weeks ago.