It’s called getting old!!!
I jest but seriously stretching, yoga etc will help and look at everything. Get on top of it before it gets too bad. Once you start getting pain it can snowball.
I used to have a Honda Civic I used as a commute car. Changed cars and went Swedish. Never had back ache from driving since. Driven from Newquay to London in 1 go before any other make of car and I can barely last 2 hours. The car costs more to run but physios aren’t cheap either.
I still get a bit of back ache if I don’t walk a good 30 mins everyday. Walk from our car park to aircraft is perfect for me.
Try to get to the gym at least twice a week plus stretching and using a foam roller when I can.
Touch wood I haven’t had any major pain in years.