question: I've been  swimming in an indoor pool for 3 years now. Pervious to this time I quit smoking, about 10 cigs,/week. This year has been a bad year for asthma & I take an over the counter antihistomene+inhailer. My concern is heart problems that is causing the problem with breathing while I swim. I'm going to guess it's alergies because my heart rate is 60 or less & blood pressure is typically 120/70. sometimes lower then that.