I had to give up my mountain bike a few years ago. My chain slipped as I came into our driveway and hit the lip between the driveway and the street.
So I was being flipped head first over the handbars, and I stopped my flip and came down without a fall with a sudden stop. The sudden stop tore my bicep head and retore my rotator cuff. The pain was so bad I thought that I was having a heart attack, and then I realized the pain was in my right shoulder and behind my right shoulder.
We left for Oregon the next day, and I was a miserable old dog for the whole trip. No fly Casting or real hikes. I couldn’t sleep at night.
When we got home my wife told me to see my doctor or she would divorce me. When I described the accident and the pain, he touched me on the bicep head. It took him and the nurse to scrape me off the ceiling.
Amazingly enough, I recovered fairly well in a couple of months. The only aftermath was no more bike riding nor casting a single hand fly rod. So I gave up the bike and moved on to the 2 handed Spey rods.
Would the doc and wife allow a stationary bike, or a real bike with a mechanism to hold the rear wheel off the ground?
Cheers!