Just curious if anyone has information about what happens to a drivers body daily in regards to ergonomics, average distance walked, average amount of weight carried, pounds of pressure on specific joints? What amount of force it takes to close bulkhead door, rear door, etc. I know every route is different, so there isn’t a one size fits all answer, but just curious if anyone has data or statistics. I’m sure UPS does all kinds of studies on this. Just want to know how certain repetitive motions effect your body and what happens long term.