When you are at work try to ignore escalators or elevators and take the stairs when you are going up or down just a few flights.
This will help you to burn calories and it should not be something that is far more than your body can handle. https://canvas.instructure.com/eportfolios/3002857/Home/The_Sweetness_of_Thoughtful_Gifts_Why_Wooden_Gift_Boxes_with_Honey_are_the_Perfect_Combination