I am on oxygen 24/7 at lit 2 with upper liters needed for physical execise (3-4 range). I enjoyed my physical therapy sessions and they seem to help my breathing so much BUT I have a very bad back plus a large cyst sitting on my nerve and walking and standing really set off the pain in back and down left side (side of cyst). I take shots in back and that calms it quite a bit. I finally had to quit rehab because I could not seem to get them to understand I needed to do things that did not upset my back. Chair exercises didn't seem to do much for me and, by the way, I have put off attempts to do left and right shoulder replacements so get shots in my left shoulder every so often. Plus they want to do 7 hour surgery on my neck (front and back). I am 77 and enjoy life, but would love to get back to my yard activities. I have a portable oxygen which I carry and can do just about anything as long as I don't stand too long. Even get back to cooking more would be nice. Does anyone have any suggestions for exercise equipment I can use to get back into the grove so to speak.