Most harnesses cut across the top of the humerus and limit motion in the upper arm and shoulder blade, which causes problems in the shoulder and elsewhere.
I have been asked about why the shutdown is helping, how all of the precautions fit in, and where do I stand on the vaccines. Here is a perspective: Without precautions Covid-19 had an infection rate
Frequently osteoarthritis, which is the most common form of joint degeneration, is caused by either too much or not enough motion. This is entirely different than an infection in the joint, aka septic