[pfedor]

From what I've read, the best approach seems to be to sit, but also to set a timer to get up and walk around for a minute every half hour or so

FWIW, that's exactly what my doctor recommended when I went to see him about back pain. I asked "Um, I hear great things about standing desks?", he didn't even say whatever, he said, "I don't want you to use a standing desk."