Some days you may know at the beginning of the day that you will not have enough time to workout all day.  On these days, you still want to be able to get your blood moving and at least exercise as much as possible.  There are ways you can exercise at your desk at work, believe it or not. You can do pushups on your desk or do a tricep workout with a book.  This may sound silly, but just these little exercises can turn your day around and give you that little bit of activity that you need everyday!  Check out this link for a few more exercises you can do at work.