A hurting back on a bike might be an issue of bike fit. Bicycle touring is a hobby regarded as accessible to even the elderly, and indeed one often comes across people age 50-80 on popular routes. Many of them will complain about a bad back off the bike when doing other things like camping or carrying panniers, but a fitted bike should not strain one's back.

Are you a bot? Seriously? The dude said he roached his back in a moto accident... no coming back from that