I recently had an appointment with a physio to try and build back some strenght as I have been doing a bit better. During the exercises she wanted me to do this "deep breathing" where you deep inhale and exhale making a "shhhhh sound". I was concerned about this as I know from past experience if I try to breathe too deeply it drains me instantly, and I ironically I feel MORE short of breath. However, at her insistance I tried this method. I started to feel very dizzy, and I told her this. She responded that this was a "good sign" and normal - means that oxygen is circulating. After the session it was clear to me I had made a mistake. I felt uterly EXHAUSTED, drained, short of breath, so that the first time in a long time for me I was unable to talk due to the fatigue. I of course know that this is not a good match for my physio - so please no comments on this- I am aware. My question is does anyone else have this experience?? and does anyone know why or what can be done to help??? I have found in my experience I am able to do a littel bit of light exercise (lying down) so long as my breathing stays shallow, and my heart rate does not go up .. aka avoid anything resembling cardio. PLEASE ANY THOUGHTS OR EXPERIENCE WOULD BE APPRECIATED!!