[bluGill]

The ergonomics expert I work with tells me "the best position is your next position". They ensure we have both good comfortable chairs, and a sit or stand workstation so we can vary our position often.

I'm constantly changing. Up, down, up, down, cross legged on my chain, up . Long compile - pace back and forth for a few minutes. It drives my co-workers nuts at times, but it is much better for the body.