Normal office chairs are notorious for negatively impacting your posture, especially if you are sitting in them improperly. Slouching in your chair may also lead to a decrease in your core strength. The solution? It may be replacing your office chair for a stability ball.
On a stability ball, you spend your time actively balancing, so your body automatically forms a more correct posture. This can alleviate any back or core strain that you may have previously experienced sitting in a chair.