only happens after cardio exercise in the cold and not during the exercising? i was diagnosed with asthma at 3 months old never used or collected an inhaler or had an attack? i dont think i have it as im fit and dont have trouble with breathing normally. im not on my phyical peak at the moment but i was pushing myself as i were as fit as i used to be in summer i havnt exercised for a month till today and i was weezing after exercise but not during and i was fine after a 5 min cool down? it wasnt bad just stiff breathing.