I will say, I was happy to see the 135 degree angle mentioned. If you meditate, you know how much posture and physical positioning can impact your state of con

I will say, I was happy to see the 135 degree angle mentioned. If you meditate, you know how much posture and physical positioning can impact your state of consciousness. Having an upright spine (standing/kneeling/sitting with a stacked spine) facilitates an alert, problem solving state of consciousness. But for less mentally intensive tasks (code cleanup, research, intra-day relaxation) reclining in a "zero gravity" position is an ideal restorative posture. We don't need to be upright for all types of work! Individual productivity is intimately linked to spinal positioning and physical comfort. I've been working on creating a product to elegantly facilitate multiple working postures. If anyone is interested, DM me and I'd love to chat about it!