When I was working at Walmart (I worked there for about 7 months), I had to work as a stockperson. I would have to pull and push up to 80 pounds of boxes from the deep freezer in the back to the sales floor and restock the freezers. It was hard work, and I ended up losing about 17 pounds. That was the best I had ever felt and looked.
However, now with the thyroid problem I have, I have just kept gaining weight and am now about 40 pounds overweight. I wish I could be that weight again, but it is very difficult.