How incredibly arrogant of you. I'm 39 and walk with a cane and experience pain in my back 24 / 7; the cane is because my legs were ravaged by blood clots brought on by Factor V Leiden, an inherited genetic condition that results in the body producing far too much of a particular clotting protein. My back pain is from a compression fracture at my T12 disc that was diagnosed while I was recovering from a fall. I'm also a type 2 diabetic, which is no surprise because every male member on the paternal side of my family, going back three generations, has been a type 2 diabetic.
So, no, I haven't been doing something wrong. My body has simply failed me.
Agreed. Some things, we simply have no control over.