Totally different part of the ADA though. If you look at what IBCCES is accepting, it's a joke in many cases.? Most doctor's notes in these regards would cover what a person should be limited from doing and/or their limitations.
Your note to your employer about your back doesn't just say "spinal stenosis" it says "should not lift more than 50lbs" "should not sit stationary for longer than 60mins" etc.