When you are going to park; take the parking further away from your job.Use the stairs instead of the elevator. If you have to send things from a floor to another; instead of using a delivery person do it by yourself. In your breaks walk inside the building or outside.
If you have a big TV with the place to plug in the computer; you could put your computer to your TV and watch and do the Sparkpeople's exercises. It will make it easier to use the computer with the TV and you'll have more space to do the exercises.