The work of any grocery stock clerk is demanding.
When you clock in (yes I said clock in) you have to report to your assignment. A grocery stock clerk is not assigned to sit in a cubicle (thank goodness) nor able to get a cup of coffee and sit around before the boss walks in.
Oh no, it is not typical office work Instead it is a day when you are on your feet on average from seven to ten hours. In a a large supermarket over 12,000 square feet you can expect to walk five to seven miles and lift hundreds of pounds of product and walk to the shelf. It is a job not for anyone. You are going to get sweaty, dirty, maybe open a bad of sugar that you realize is open.
Being a stock clerk is all that and then some. But the work is admirable in that you are helping customers get feed and servicing their needs.