I've been running since the spring and loving it but I keep having to stop for weeks at a time because of sore throats, colds and coughs. I had a cough in June/ July which turned into a chest infection needing antibiotics. This week I've picked up a cold and slight cough from my daughter so am not running once again. I wonder if running is knocking back my immune system over and over again. I'm 59, weigh 10 stone and am not new to exercise, I've always cycled, walked, swum, gone to the gym anyone have any thoughts? Thanks.