@japanjim I worked very physical jobs for more than 35 years, plus I helped a lot of friends and family move when they needed the help, so it may be from nerves in my back as well. The reason I never considered this before is because I've never really injured my back, just the occasional pulled muscle. I drove a truck for a printing company for over 13 years, and worked for 17+ years driving a truck for a national office supply company, so I walked hundreds of miles, climbed thousands of steps while making deliveries, and climbing in and out of my company trucks. And I moved literally thousands of tons of products during that time without really hurting myself. I think my body was just worn out by the Summer of 2015 when I had to walk away from my job and "retire" on permanent disability. I have osteoarthritis and spinal stenosis in my lower back, but a neurosurgeon looked at the MRI's of my spine and doesn't think it requires any surgery. I've already had 2 spinal fusion procedures done on my neck, and having more surgery on my lower back wasn't something I was looking forward to anyway.