Originally Posted by
cat0020
I also ride recumbents now, but mostly with my girlfriend at leisure pace when enjoying scenery is more important than going fast. If you have questions about recumbent bike, I would be glad to answer them.
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.