I have the Ikea sit-stand desk, but I find it hard to stand during deep focus work. I rotate between a tall cushy stool and standing when the desk is up. When the desk is down I rotate between a standard office chair I got when a former company shut down and a kneeling chair (https://www.amazon.com/dp/B08W4YFQTK/ref=cm_sw_r_cp_apa_glt_...).
The kneeling chairs mimics my natural sitting posture in the office chair and the stool, but it's brutal on my shins after an hour or two. Sitting like that (which I do anyway) is also quite bad for my hamstrings, which are super short.
I don't really get back pain so much as hamstring and hip pain, but using a resistance band to do a few stretches a day helps a lot.
The kneeling chairs mimics my natural sitting posture in the office chair and the stool, but it's brutal on my shins after an hour or two. Sitting like that (which I do anyway) is also quite bad for my hamstrings, which are super short.
I don't really get back pain so much as hamstring and hip pain, but using a resistance band to do a few stretches a day helps a lot.