When someone says he died of COPD what exactly do they mean? His lungs just gave out and he chocked to death. Or is it that the COPD caused other organs to fail and thats how he died. Like heart or kidney failure. A question about exercising your lungs like pushing yourself on a treadmill or a bike. You go till you get SOB and stop and rest. How about carrying in the grocerys from the car. Back and forth in and out, you keep going untill you are SOB. Eariler that day you got SOB from showering and drying off. Whats wrong with that being your pulmonary rehab workout for the day?