In the few years prior to giving up the world of corporate telecom
for full time creation of jewelry, I purchased my own office chair,
a Balans kneeling chair. When I left, I took it with me; and when my
studio was completed a couple years ago, I placed it there. It’s on
casters and has a pnuematic lift for adjusting the height, so it
works well for me whether I’m at my lower laptop/computer desk or my
higher work spaces. I’ve sat it in comfortably to knot pearls, cut
and pierce metal, solder, string beads and play for hours with PMC
and Polymer clay with no back discomfort whatsoever. I no longer have
the receipt, but it was over $300. The web site I found at the time
had versions with and without a back support. I purchased the one
with the back support, but have never felt the need to attach it.
"Kneeling chairs were invented in Norway in the 1970s, starting
with Hans Christian Mengshoel's experiments on sitting devices
with support under the shins. Furniture designers Peter Opsvik,
Oddvin Rykken, and Svein Gusrud each developed chairs based on
this principle. These designs took as their starting point the
strain placed on the spine by conventional right-angled chairs.
Kneeling chairs open up the angle between the thigh and the
torso, making it easier to retain the natural curvature of the
spine.This posture changes the stress distribution of the human
body in comparison with the sitting position of an ordinary
chair. Because the angle of the hip joint is between that of
sitting and standing, it allows the spine to be in a more
"neutral," or middle-of-range, position. Because the knees are
lower than the pelvis, the normal curve is restored to the lower
spine, which reduces stress to the lower lumbar vertebrae."
This site has multiple versions in a range of prices… I’d suggest
choosing one that is on casters and has the pnuematic lift. Anything
less will still be comfortable, but may cause a lot of cursing.