I worked as a security guard in the past, and when I was at the store door for 8 hours in a row I discovered pain in muscles that I was not aware of, but when I was working 10 hours waliking around the store I was ok in the end of the day, despite being more 2 hours of work.
So in my experience It’s so painful to stand up in the same spot for hours, and I think is not good at all for our healthy.