Back injuries.
Normally, I'm a science & engineering guy.
Had back problems galore as a 19 yr old and on. Was immobile for a week + at a time in my 20s.
And I'm a guy who never otherwise got injured/hurt in sports.
Finally listened to wife went to chiropractor in my late 30s.
Fixed.
Do NOT buy into their theories, but every single time my back went out, it's been fixed.
No back problems and I'm a wicked geezer now.
Us engineers are pragmatists. If it works and theory is not there, we go with what works.
"Mitchell, GO!" in the words of the last SB.