Reading through the Reddit comments thread on the subject was illuminating, as people who have had this job elaborated on it. There’s a reason he limbers up in the beginning, and lays down when he can: The job is murder on the body. He’s in a crawlspace, and kneepads aside, he’s kneeling on metal. It’s either incredibly hot or incredibly cold in there. The bags are heavy, and there’s no good way to get the body leverage required to lift them safely… More here.
We have a suspicion that our luggage is not looked after as much as it should be and we don’t know how true that is, but boy is this a tough job in such a confined space. The damage this must do on the body in a short time is immediately apparent.