I sympathize. I had a prolapsed (or herniated) disc about 30 years ago (stupidly lifting something very heavy on my own), probably my most painful experience and which lasted for months afterwards, and even now I have to do daily exercises to avoid lower back pain.
Give them time! Human spines evolved to let us stand, run, walk, lie down but not sit on chairs for hours on end [where all the upper body weight creates big forces on the lower discs]. We make kids at school and office workers sit [slouch] all day on cheap, ill-designed chairs. It’s no wonder that so many people suffer low-back pain after decades of that abuse.
I’ve completely changed my mind about carrying a portable chair - no longer considered an unnecessary luxury - rather something to extend my on-air operating time.