
Originally Posted by
greenfrog
The pose you've posted is a good place to start, though I prefer to do it lying on my back, pressing my lowered foot (the one that in your version would be on the floor) against a wall or heavy furniture, then I scoot my buttocks toward the wall/furniture until I start to lose the neutral alignment of my pelvis. Also key to this is keeping the toes of the "up" foot drawn directly back toward the shin, rather than letting them extend. Keeping them drawn toward the shin will protect the bent knee from torquing, and focus the stretch on the hip joint, where it's needed.
But I wouldn't be a responsible yoga teacher if I didn't tell you this: Lotus is not a pose that most Westerners should ever expect to do comfortably, and more knees get wrecked by grasping to the contrary belief than you can possibly count. Even half Lotus is something that most Westerners should not expect to attain until after years and years of constant and devoted yoga practice. If you're looking for a stable meditation pose, consider sitting on your shins and tops of your feet. If that isn't comfortable (and for lots of folks it isn't), find a meditation bench. It took me many months before I found the right combination of butt altitude, knee support, and ankle support before I found seat that I could maintain for an extended period. Sally Kempton advised at the last retreat I did that she can no longer sit comfortably on the floor precisely because she tried to fit a physical mold that she thought was the "right" or "best" or "traditional" seat, and she wrecked her knees for good pursing that belief.
(enough yoga teacher rant)