Wednesday July 7, 2004

Sit on a Ball

I have an "interesting" and unusual chair that I use at The Job. It's a 65 cm diameter, puncture-resistant, inflatable exercise ball! It makes a great conversation piece and it helps my back.


The main problem with sitting in a NORMAL chair, is that it does not encourage movement. We may be able to sit "properly" for 10-12 minutes, but after that our muscles become tired and we fall in to bad posture, most often using a back rest. We get involved in what we are doing on our computer, and forget about our bodies. Our muscles switch off! In time, our muscles become weaker, and less able to support us. This is true particularly of the small, deep trunk muscles which are of great importance in supporting our spine.

What about the well designed, ergonomic chair? Well, at least in some of these types of chairs, when you have it adjusted properly, your spine is held in correct alignment. The problem is that there is still very little movement permitted, and certainly no encouragement to move. The end result is that our body becomes weaker, less able to support itself, and less able to cope with the pressures that we put on it when we are not sitting.

[ cf Ball Chair article ]


The ball encourages a lordotic lumbar spine position, both as a means of centering one's center of mass over the ball and also as a means of providing a stable pelvic base on which to balance one's upper body. An undesirable slump position is discouraged by sitting on the ball, as this posture increases the ball's instability. ... The continual gentle postural correction required while sitting on the ball reduces the static loading on any one structure.

[ cf Ball Seating Research

All that and it's kinda fun to bounce on while I work. It looks cool too :-)

Sit on a Ball ( in category Gemisch/Gallimaufry ) - posted at Wed, 07 Jul, 19:28 Pacific | «e»