I'm 65 and my only real problem is a couple of bulging discs in my lower back. I found the height of my bass is the biggest factor when playing standing. The higher up my chest, my preferred position, the more it aggravates my back and I'm talking fractions of inches, I can play with just a t-shirt on and I'm fine, I put a sweat shirt on with the same strap and know my back will start to bother me just because of the higher position caused by the thicker shirt so I have to use a slightly longer strap .