Dealing With Muscle Soreness After Long Music Sessions

I spend a lot of time working on my audio setup, moving equipment around, and sometimes standing for hours during events. Recently, I have noticed more stiffness in my shoulders and back after longer sessions. I know many people here probably have similar experiences from carrying gear or attending shows. Has anyone found good ways to manage everyday muscle discomfort? I recently came across the term Pain Relief Balm and was curious if anyone has tried something like that for occasional soreness.