@rpec
If I were not on Oxygen I would not be able to breath. My levels went down into the 60's without it (back when I was put on Oxygen). So I can certainly do more on Oxygen than off it! I can at least function now. But I cannot do much that is physical. Without the Oxygen I would not even be able to sit. By late afternoon I can usually get on the treadmill for 20 minutes. I have it set without any incline and just walk easily. Otherwise I can walk around our small house and do little tasks and sit often inbetween.