They did that in my walkthough ~7 years ago when I got hired. They'll hire basically anyone, but they're trying to filter out people that can't or won't do the job, and part of that is the initial walkthrough where they basically try and scare you off. If you get scared off, you probably couldn't handle the job, either because you are actually too weak, or you're not mentally tough enough to handle the demands of the job.
Everyone thinks they can handle themselves no problem if it's for a good job, but once you're buried in boxes it weeds people out fast. A ton of the people that get hired on are gone within the first few months often on their own accord.
The bad news: Yes it's very physically demanding. Fit or not, you're probably not used to the work. It's almost worse if you're fit because there's a pretty high risk for injury early on before you figure out what you're doing, and if you're fit, you'll be able to move much faster, but if you're twisting your back a lot and
, you might hurt yourself. You'll be moving a lot of boxes constantly that weigh up to 70 lbs, that are sometimes in very awkward shapes, and they'll want you to do it quickly.
There's also a lot of mental stress. There'll be pressure for you to get your job done quickly, so you can go home, yet
will be backed up on you, often times no matter how fast you go. You'll have to work with people that make your job harder, supervisors that don't know
about the job you're doing and make stupid decisions, and people that
you over in the process of trying to do their job. I've seen the nicest people just lose their
sometimes when things are particularly bad.
The good news:
Eventually your body will catch up. You'll learn to move efficiently to use as little energy as possible while still moving quickly which'll result in you using like a quarter of the effort and going twice as fast as someone else that's new. Your muscles will build endurance to the point that you're no longer getting sore or even tired (as long as you eat and sleep properly). And the job will stop being stressful to you as you start seeing the big picture that it's just not worth getting mad over. Everyone just wants to go home, and it's not really that big of a deal if it takes a little bit longer to finish up or you have to stop the belt as long as you're doing your best. Eventually the job will feel easy as
, and you'll probably find yourself thinking that it would be the easiest job in the world if other people just did their jobs better (although the reality is a bit more complicated than that).
You kind of see this effect with an overweight person that joins ups. At first they lose a ton of weight for the first few months as they're working way harder than they need to, then they start figuring the job out and it comes back. But they're not worse of a worker as they're actually going faster than when they first started, they just eliminated unnecessary movements and learned how to work with the packages (and got stronger).
The secret bad news:
Once you get to this point, you gotta take care of yourself for the long term because now you gotta worry about the kind of injuries that come after doing the job for years. Pay attention to the methods, especially 'step or pivot, don't twist', don't
up your back, make sure you squat versus bending over, etc. If your body starts complaining, pay attention to what you're doing and figure out if you need to change something up, do something different. As a sorter I got really close to injuring my wrists, back, and shoulders multiple times until I started eating more protein and figured out a sorting style that put as little stress on my body as possible (it's basically a very active steppy style that uses body momentum as much as possible to move stuff around).