So, I believe your back is not in the best shape - just possibly a bit like mine…
Last year - I ended up having EXCRUCIATING back pain - could not work; I almost passed out from just trying to get into bed…
Anyway - when women give Birth - BREATHING is a big deal. Controlling the pain via breathing.
The Back doctor told me that my ‘core’ had gone ‘offline’; and that is why I was in EXCRUCIATING Back pain. They talked with me about just taking a light breath; and then gently letting it out - and AS I gently let it out - to move in the direction that I wanted to move. Small steps. So that got me in & out of bed PAIN FREE; and moving SLOWLY - pain free.
When I went back a week later - they told me to tighten my stomach muscles (abdomen) - WHENEVER I was lifting, or moving, or whatever. And I should try to always have my stomach muscles ‘tightened’.
This resulted in me being 100% PAIN FREE; and total movement. Been that way for a bit over a year; just recently had emergency surgery (gall bladder); and have been forced to be inactive. And am now noticing my back is starting to bother me. Mentioned it to my wife - “Hey, I got to start tightening those stomach muscles again… my back is starting to bother me with laying around to much…”
Anyway - I hope this might help you. I couldn’t do ANYTHING - the back pain was so severe. And of course in our daily life - bending over (rather than trying to kneel; or twisting the upper body; rather than pivoting the whole body - screws up one’s back. But possibly with some regulated breathing; and tightening your stomach muscles - you might find the vehicle seats - become a total non problem.