MJD, I hoped by now they had something better to offer than fusion.
I recall how sore my hands were at 8 weeks after carpal tunnel surgery and they weren't ready to grip tools [but the State L&I said that I was ready].
Tilting back the head for long stretches is a pain, so avoid it. Fly larger models, further out.
After my wrist surgery[s], I had to ease back into flying for awhile.
I imagine that swimming is considered good medicine for back patients. Seniors in the US have what's called the "Silver Sneakers" free health club membership now. Our local club has an indoor pool. The local High School and YMCA also have pools. I've got some back "issues" that come and go and what helps is normal paced walking on a treadmill. The treadmill has a spongy feel that agrees with my back. Driving for long stretches and sleeping wrong are my things to avoid.
I guess you should be itching to have some stitches removed by now...?