It's all so senseless to me when they do all that! If we went to the E.R. every time our oxygen dropped below 88, we might as well camp out there full time! Especially when we know that if we just sit and rest for a few minutes it will come back up! That's my experience anyway! Yesterday, I was doing some cleaning around the house, doing some carrying and lifting and I kept it up for a good 15 minutes of somewhat strenuous activity, for me, anyway, I started feeling a bit weak and realized that I probably better check my oximeter reading and it was at 84, so I sat down and rested, and within a minute or so it went back up again to about 90! I also have other health problems, which include asbestosis. I have no idea how or when I was exposed to asbestos! Yet for a 79-year-old woman, with my health problems, I do pretty good! So do you, actually, so keep up the good work. Just rest and take it easy inbetween your activities!