I have end stage copd and am on o2 and have shortness of breath walking 10 feet to my bathroom.My oximeter goes from 94 down to 80 .I sit to pee as I caant stand as long.I just got a referral from my pulmonologist to go to pulmonary rehab. My breathing became an issue after my last hernia surgery {#14} and woke up having trouble breathing.MD. said that everything was put in my abdomen and is against my lungs so copd is more prevelant. Will Rehab help or has anyone else in my condition done this???