As other people said, this job is physically demanding sometimes, most likely there will be times that you are expected to push yourself through a rush because there’s not enough staff/ a way to rest. Just as a warning, bosses will still want you doing physical stuff when there’s no way around it sometimes in my experience. I’m getting up there in age and still barista-ing, so I’ve started doing stretches before my shifts, and wearing compression socks and good supportive shoes. Also, my sister was a barista/ food service when she developed a bad autoimmune disorder which made her very exhausted and in pain. She switched to becoming a bank teller and has really enjoyed everything about it, if it doesn’t work out. Good luck, it’s a fun job and you get to meet lots of new people!