Fit balls do not allow for ideal seated postures [reclined, declined, upright – recommended by the Human Factors and Ergonomics Society (HFES)], do not provide sufficient adjustment to properly fit the user, do not have back support, and force a user to engage the core. While core strengthening can be beneficial, this is not recommended for extended durations. Proper use of a good ergonomic chair, that adjusts to fit the users body appropriately, can allow for dynamic posture changes and movement, which not only helps minimize static postures, but also does not force the core to unnecessarily engage their core. Fit balls, regardless of the type, also have minimal if no adjustment at all which is a crucial part of a chair being “ergonomic”. Furthermore, fit balls can be unstable and can lead to safety risks such as falls. 

Please review the below documentation for additional information regarding fit balls, their detriments and various studies on the use of fit balls, office chairs, spinal compressive forces and more.

Position Paper – Exercise Balls
Fit Ball vs. Office Chair – Fact Sheet

Additional education on seated postures may also be useful. Many employees may have the wrong chair or are unaware of how to use their chair to best benefit the body. Knowing how and why to use the chair correctly is crucial in decreasing pain and discomfort and reducing injury risk while seated. Movement is also crucial and even with a good ergonomic chair, sitting too long is not ideal.  Review the Workstation Setup Tips page for additional information and videos on ergonomic chairs. See also the videos below for more on dynamic postures and movement.