After a long day of sitting in front of a computer all day I feel as if I should go to a yoga class and stretch out. From my neck to my toes everything feel stiff . My legs always felt the worst. So as a solution to this I simply take the waste paper basket place it under my desk and prop one leg at a time on it and gently lean forward. Here is a link that has 12 simple tips for stretching exercises at your desk.