I worked in ClickList at Kroger. Supervisor was honestly kind of hot and I regularly did not mind getting scolded for seeking her to get a glimpse of her when I needed to be working.
I no longer work there. A few years pass....
I'm shopping at the same store and see my supervisor working. She's now overweight.
I guess the moral of the story is you can't assume you burn enough calories pushing a cart around all day. You have to do cardiovascular exercise in addition to gym workouts involving weights.
I notice a lot of skinny guys working there and more often than not, overweight women.