In the physical they test your ability to lift 100lbs. If you can pass all the pre-physical tests and be hired you are expected to "lift" but more than likely push, pull, and/or lean anything by yourself. Weight varies from 2lb lamps to 450lb dressers. You are expected to do everything by yourself and asking for help is "frowned upon" although they say be safe and ask for help. The job can be strenuous on the body if not in decent shape but you dont have to be "fit".
Yes, they take anyone. Revolving door....