So glad you found the site! Hope everything continually improves. I think you have to gauge your activity carefully. Sometimes your workout is just trying to do a little of what you did in your previous “normal” life. I would gradually go longer or add a little as time went on but my body would quickly tell me when that was too much and I had overdone it. I have tried to stop that ahead of time but I am notorious for missing the mark and paying the price for a couple of days after.
The good news is that the point at which I overdo things is so much further than it was initially. It happens so slowly bouncing back and forth that you don’t even see the progress sometimes until you look back. I feel like most of us have this in common just at different levels depending on the severity of the damage.
I’m 2 years out this week and I never would have believed I could have recovered this well so far. It’s funny how I still focus on deficits instead of what I can do but I like to fix what needs fixing. I feel that exercise should come slowly and not as previously defined. Don’t get discouraged and keep trying like you are doing. You will build back just back off when you need to and move forward again when you can. Good luck with your coaching!