You know how Lifehacker and those types of sites are always telling us to use standing desks instead of plopping our butts down in front of our computer?
Well, turns out no one knows if that's any better for you!

Standing can also be bad for you, says scientist studying desk set-up
Researchers are falling down on the job of figuring out the healthiest way to work.
I don't do it for health reasons. I do it because I had constant back-ache for years when sitting down, and it completely disappeared once I started working standing up.
I think I'm going to convert my setup to prone just to cover both bases.
Hmmm did you see this +Craig Froehle ? I know you like standing.
Strctural engineers at either UC or Imperial iirc determined that least spinal stress occurred with the spine at 17 degrees off the vertical when seated. I have spinal stenosis so I work on  a beanbag nearer to 90 degrees.