They do operate some heavy equipment in the warehouse, but the people on foot aren’t that safe. Many injuries are based on people being unprepared for such an extremely athletic job, repetitive strain, or continuing to work injured. The more serious injuries are normally stuff like back injuries from lifting heavy weights bent over in a hurry, falls etc.

One example was dog food stored under a low platform so people needed to Cary 50lb bags while bent over. It’s possible to do that safely, but when you’re tired and in a hurry it’s easy to hurt yourself doing that.