2 months ago I had emergency surgery for a bowel obstruction. I was able to get back on the bike after a month, despite having a feeding tube still hanging out of me. I lost almost ALL of my endurance, mainly because I had lost so much weight, most of which was probably muscles. I was able to ride for two glorious if frustrating weeks. I was slow, but at least I was riding.
Then, I had complications following the removal of the feeding tube, and I've been off the bike completely. I can't even ride the trainer for a disgusting reason that I'll spare you.
I am well past insane at this point...