Originally Posted by
BlazingPedals
Recumbent rider here, too. My first and second thoughts were that riding the wife's recumbent could have caused the current problem if the seat to pedal length was mis-adjusted too long, leaving the lower back unsupported. If that's the case, the injury is muscle-related and should be temporary.
Back injuries are no fun, and I hope this one heals itself soon.
You could be spot on with that. Forty miles in a totally new riding position could have been taking on too much too soon. I may have irritated the disc at that point and have been unknowingly compromised since then.