How Do You Deal With Back Tension After Long Rehearsals or Shows?

I was wondering how other musicians here deal with the physical side of playing for long sessions. After rehearsals, especially when standing with a guitar for hours or carrying equipment around, my back can feel pretty worn out.

I know stretching and taking breaks help, but I'm curious what routines other people use before or after playing live. Some friends have mentioned things like massage, warm-ups, and even using products like Natural Balm For Soothing Back as part of their recovery routine.