if you are a grown man below even 60, there should be no reason you can't lift and drop off boxes all day long and just drive a fucking truck without ending up with back problems unless you are unhealthy to begin with.
I don't think you know what you're talking about.
I've talked to my share of UPS and FedEx drivers being in shipping and receiving, and they all say that it takes a huge toll on your back. It's pretty much the biggest complaint about the job.. especially the ones that have been doing it for 20 years.
It's difficult to do anything for that long and not feel the effects of it.
Also, have you ever driven a lot? Let alone a big truck like that? Driving is very tiring. It requires you to be constantly alert. You are drained by the end of the day.
<-- used to drive 12-16 hours a day, and I didn't have to lift anything heavy.
Edit: And yeah, anyone saying that any job at UPS involving loading/unloading is easy is quite frankly insane. I don't think you realize the sheer volume of packages that they go through. The pace is very, very fast and grueling.
I've never worked at UPS or FedEx, but I've talked to people that have. It also doesn't take much foresight to realize how hard the job would be.
Ever tried unloading 120 boxes that weigh 40lbs each? That's an a-typical delivery for my place of employment, but it's not unheard of. And we're our driver's first stop.........