Hi @jeffrapp and @rwinney -- Here's the article Jeff was referring to:

Peripheral Nerve Fibers and Their Neurotransmitters in Osteoarthritis Pathology
-- https://www.mdpi.com/1422-0067/18/5/931

I can relate to it but I'm really not sure. I have osteopenia and degenerative disc disease. I've had trouble walking the past 4 or 5 years and it has gotten continually worse. @artscaping tagged me in a discussion on Camptocormia - https://connect.mayoclinic.org/discussion/camptocormia/?pg=5#comment-339304 which fit my symptoms to a T. My wife has told me I walked like an old man when I was in my 50s and now in my 70s it's become worse. I found more information on it and am planning to discuss it with my doctor at my next physical in the Spring to see if there is a treatment/therapy that will help before I get into the upright walker needed stage -- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6075991/

Thank you for sharing the article. Hoping I can take a deep dive reading and trying to understand this weekend.
John