Mark Sisson, Standing at Work

The chair is a bit like wheat, actually: a relative novelty to which we aren’t physiologically adapted that has become a cultural staple nonetheless. For at least eight hours each day, we twist our bodies into weird Tetris blocks with poor posture and sit, for the most part unmoving, on chairs. When you stop and think about it, sitting down in a chair for extended periods of time seems a little silly. I mean, it’s not even all that comfortable (isn’t that why we distort our bodies with terrible posture – to make sitting more comfortable?). We aren’t “designed” to sit in chairs. We’re certainly meant to stand, but we sit in chairs because we designed them to fit our anatomy, and I somehow doubt that whoever came up with the chair was thinking about long-term effects on our physiology.

Is sitting on the floor healthier for the body? Does it matter whether it is Korean style or "Indian" style or Japanese style? I suppose it is the alignment of the back which matters, not the position of the legs.