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Large inflatable balls have been in use for decades—primarily for use by physical and occupational therapists, and by exercise enthusiasts. In recent years, these devices have also begun to be promoted as a healthy option for sitting, particularly when seated at a computer at work. The concept of "balanced sitting", by opening up the hip angle to as much as 135°, first posed by A.C. Mandal, M.D. back in the 1970’s is finding more favor among scientists and medical experts these days. There are several alternative methods for achieving this posture while seated, including the use of kneeling chairs, saddle chairs, and a padded wedge located on the seat pan of a standard office chair. Possibly the most radical of these options are ball chairs. These come in many sizes, and can be inflated to a variety of pressures, depending on the need and manner of usage. The basic principle for their benefit is that, if used properly, they will provide balance to the spine, promoting and maintaining its natural curves, for greater comfort and overall health of the spine and back. These balls are available through a variety of sources, including: www.fitter1.com, and www.sissel-online.com/product/ball_chair.php. Some advocates of these devices also stress the need for “active sitting”, meaning the spine and trunk of our bodies should stay in motion, to some degree, in order to maintain balance and health. Ball chairs are probably the easiest way to deliver such movement.
Possible benefits of ball chairs:
- User comfort
- Promotes “active sitting”
- Open hip angle can be achieved
- Sizes to fit every user
- Promotes health and fitness
Potential drawbacks:
- Ball could pop on a sharp object, if made with materials of inferior quality
- No benefit to spine if used improperly
- May be too unstable for some users
- Could pose a tripping hazard
- Appearance may not seem professional in the workplace
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