catmoon wrote:One thing I can tell you is that sitting on a carefully positioned earplug results in an immediate and dramatic increase in one's awareness of posture.
not denying that it's a plug... but given your statement, are you sure it's for the ear?
Back to the original question....
I'm not that flexible, I can maintain a decent half lotus for maybe 10 or 15 minutes. When I sit cross-legged for a while, my ankle bones hurt, my legs fall asleep, my knee & hip joints scream at me.
Picked up an ergonomic kneeling chair, but noticed some issues with it. For starters, my knees sweat a lot when I use it for a long time. Also, it doesn't help me when I have to sit cross-legged at the temple.
I bought a crescent zafu and a zabuton from the fpmt website. It helps, but I still have to supplement with another pillow and I still have some issues with my ankle bones, numbness, & joint pain.
Waiting on a second zafu cushion to see if that helps. I'm a pretty big guy, not super tall, but I have long limbs, so I need a bit extra lift.