The rowing machine helped me a lot with upper back pain caused by a collapsed thoracic vertebra. I thought I wouldn’t be able to use it but actually felt no back pain at all when rowing, and as I got able to row for longer I found that my pain doing other things was lessened and I started being able to stand and sit comfortably without pain. Does make me feel like a bit of a fool for putting up with the pain for years when that was all it took.
Good for you. Glad you are better.