Killed my back at an early age but it wasn't too bad until my wife wanted to buy a mom and pop furniture store that mainly did rentals but also had a sales floor. At the time, I was working as a machineass at the refinery plus building engines and rear ends. Hurt my back at work but again, it wasn't too bad but being the grunt delivering furniture was the biggest killer. Handling 80 lb 8 3/4 chunks got a bit tougher too. Several years later dizziness issues started in on me. Most of that is gone now except for whenever I get down on a creeper and then stand back up. Gotta let my head stop spinning then get under the vehicle and do the same thing when getting up.....and the eyes suck now too. Add in some of Mr Arthur Rightous and well, 67 isn't feeling all that great.
Cranky, if low blood pressure isn't causing the dizziness when you stand up, ask your doctor about Meclizine (25mg chew tab). You chew one a while before going under a car and it really helps with the dizziness. I believe Hemi-itis is a user as well...and heck, don't you know? These are the Golden Years...lol.