Employees are not rotated through different positions often enough.
You may work on packing lines which are not very hectic. You do some lifting but not much over your head and there is always someone near by to help if you need it.
Working on the shipping dock is where the problems begin. This involves loading a trailer by hand. You will be lifting packages up to 50lbs and loading them into a semi trailer. Amazon expects these trailers to be loaded all the way to the top which is about 9 feet. So lifting 50 lbs packages up over your head. This is perfectly fine for a few hours. The problem starts when you are working 5 12 hour days and doing this every single day. I informed 2 managers that I was injured and could not do this work every single day and neither one of them seemed to care. This eventually lead to me having to quit because my body just could not handle lifting these packages for so many hours. If you are already in EXCELLENT shape this shouldn't be a problem for you. But coming from a desk job I just couldn't do it without a few weeks of adjustment. Integrity and Amazon don't give you any time to adjust. They expect you to do this for 60 hours a week from the day you start.
This brings me to my next con. Integrity will tell you that you are starting in a different position then you really are. I was never informed about having to load trailers like this. I was told I would be picking packages and walking 10-20 miles a day. This was perfectly fine with me and is what I wanted to do. Upon arriving to work the first day we were told that they tell everyone they will be a picker because in the past they hired people and then they did not want to do all of the walking.
Lastly, these Amazon warehouses are very large. It can take 5 - 10 minutes to walk from your job location to the break room. They expect you to clock out the second lunch starts, and to be back in your work position exactly 30 minutes later. This basically cuts your 30 minute lunch down to 10 minutes. There is barley enough time to even heat up your food, eat, and use the restroom.