The back problem I reported on Wednesday has gotten a lot better, I think it was just a muscle strain. Wednesday I was able to do my hard ride with intervals without disturbing my back. Then Thursday I was able to do my upper body workout. I did modify it to leave out the exercise that messed me up when the exercise band handle’s strap broke, since the same muscles are covered by my arm cycling. Then I did my easy day recovery ride on my upright bike, and was pleased to be able to do a lot of standing pedaling. That’s been a problem the past few months because of soreness in the area of my Sacroiliac (SI) joint, but that has mostly gone away at least while stand-up pedaling. It still bothers me if I walk or stand around for too long. Yesterday I went for another hard ride with intervals, this one longer (3 hours), and it felt fine. It’s nice to be able to go hard again after a setback clears up.
Wednesday’s ride is posted on Strava here, Thursday here, Yesterday here.