I exercise 3 to 4x per week and feel it is partially responsible for the reduction of symptoms (i.e. coughing). I do not and have not taken the antibiotics. I will only consider them only IF my symptoms become unmanageable. Thus far, thank goodness, I am doing well with good energy level, appetite and I keep a very positive attitude. I fear antibiotic side effects, especially the hearing loss. Three people I know have lost part of their hearing from antibiotics and that is enough for me to shy away. I am a musician and hearing is extremely important to me. I too, received this diagnosis late in life. My moto: It is not what happens to you, it is how you handle it.
I am glad to hear you are exercising. It sounds like you are taking good care of yourself.