[nobodysfool2]

All those things wrong about 'sitting' are wrong about standing also. It's the fact that your spine is supporting your weight that causes back pain and issues. If you are sitting, it's best to use the chair back to support your back so you can recline in a 135 degrees.

http://en.wikipedia.org/wiki/Sitting#Posture

[subsection1h]

> If you are sitting, it's best to use the chair back to support your back so you can recline in a 135 degrees.

This idea is supported by a study that focused only on the volunteers' backs, not their necks, shoulders, etc.

[DanBC]

Standing still is sub-optimal. But that's why treadmills are better - you're exercising and building muscle and that helps back pain.

[aspirant]

The tide is probably turning against that opinion: the aches and pains are not due to the body doing too much, but too little.