A totally random tip, which I'm sharing on the off chance that it might help one of you the same way it has helped me: I have a Herman Miller Aeron - which I l

A totally random tip, which I'm sharing on the off chance that it might help one of you the same way it has helped me: I have a Herman Miller Aeron - which I love, and spend most of my working time seated in - but sometimes my lower back hurts a bit (I'm getting on in years, so this is a factor too). I've tried height adjustable desks, but I don't find standing for prolonged periods of time all that comfortable. But what has done wonders for me is simply kneeling on the ground, so that the rest of my body is upright, and I'll place a soft wide pillow under my knees to cushion them a bit. In other words, only my knees are bent (so that my shins are parallel to the ground, on the floor, perpendicular to my quads). But my upper legs and torso form a straight line. The height of my desk is just right so that my forearms sit comfortably on top of my desk, and I find that I can sit like this with a perfectly straight posture for long periods of time whilst remaining totally relaxed. This kneeling technique has helped alleviate my occasional lower back pain, and I hope it helps one of you too :-)