According two separate studies done in 2008 and 2009, the exercise ball chair doesn't really do much for your body, your health, or your posture. Results indicated that users of the chair did lose an additional 30 calories a day but that there weren't any improvements in posture — though using the chair was linked to spine shrinkage. It does however help strengthen your core, but not by a measurable amount.
When all is said and done, it looks like studies say you'll be slumping just as much as you do in a traditional office chair and end up with a smaller spine... splendid!
• Read More From Social Workout and The New York Times