Do you spend long hours sitting at your computer? And would like an easy way to get more exercise? Stability balls have been around for some time, but computer use is making them more popular. The Technogym, Wellness Ball, Gaiam, Buoy from Turnstone, Muvman and Swopper from Aeris are some ergonomic options for increased well being. Here are some reasons you may want to consider switching your chair for a stability ball.