I have something that has a lot of people that is expanding like a virus is our sedentary 21st century people who are back pain sometimes there are days that sometimes they become very annoying, I used to be fat but I had a good weight loss in this last year, but the damage is already done,
and I lost a lot of muscle mass in the back and I need to do a series of exercises,let hope all work up. Anyway thank for sharing as always great info @senseicat