Honestly, not to be a hater, but I been working in a big hub for 5 years, and if you can't push 1,200 out of a truck by yourself, or think that is to much work, UPS might not be the job for you. I am usually a sorter, but I enjoy unloading as well, and easily on a bad load I can push 1200 without trying to hard. Trick is you have to learn to let the boxes do the work. For example gravity when high, and when they are on the floor, wide base bend at the knees slight bend in the back, and u don't have to stand all the way up after each box just shuffle them on to the belt from that position. Saves the back, and it allows u to get boxes up pretty quickly using less energy. If you can't do it in any weather, winters are freezing cold, no shame in leaving. UPS is not for everyone it is hard work.