Some people with Parkinson’s disease (PD) may experience shortness of breath. There is no clear cause underlying respiratory dysfunction in PD, its frequency or the effect that medications have on respiration. Several reasons for shortness of breath in PD include:

Read more here https://www.parkinson.org/Understanding-Parkins...

I use 3leter of oxygen at bed time! When I sleep my o2 falls dangerously low! I have so many sleep studies! No one seems to know way! Its a mystery! Oh bother! I just roll with the program! Happy Holidays you all!

I do not smoke, but occasionally i do get winded when only walking short distances. Also i always have to clear my throat like something is in there. The joys of PD.