@john2563 well John I was approved for a oxygen concentrator in my bedroom and a portable and I would be out of breath just walking to my kitchen so I would say I am, I don’t need or use the concentrator so they picked that up but I kept the portable just incase we go away and I need it, but everyone’s body handles things differently, i started watching what I was eating and exercising everyday day just trying to keep living, I can’t exercise like most people so I bought the elliptical machine it’s just peddles on the floor like a bike and i peddle away, I can’t do a marathon but greatful that I can breathe better then what I was. Definitely talk to your doctor he’s supposed to help you