If your workplace floor is concrete, granite, or ceramic tiles, odds are your feet and back would hurt so bad. If you can, take a break by standing in a position that has more cushioning and shock absorbency to take some weight off your feet and back. Wood, grass, or rubber are great examples.
You may be familiar with the pain and discomfort you feel while you are standing or walking for most of the day at work. By standing on your feet for much of the day, existing foot conditions will amplify and may get worse, including discomfort that may arise from corns, calluses, or certain deformities of the foot.