First, I have read in Yoga for Dummies by Larry Payne that half-Shoulderstand is not safe for people who are moderately overweight. Most of the teachers I know don’t feel this is true if there is adequate preparation and counterposes and the student wants to do the pose. So, do you feel it is OK for people overweight to do the pose or not?
Second, when doing a seated or standing twist, does the pelvis move or remain stationary and the spine spiral out of this base. Judith Lasater in the article on the sacrum in the last copy of Yoga Journal said the pelvis and sacrum must move as a unit, which makes sense. But with an abdominal contraction to support the sacrum, which is what I learned from Gary Kraftsow, neither the sacrum nor pelvis moves. So I don’t know which is the most safe and stable. Perhaps I’ve misunderstood one or both of them. Thanks you for addressing these questions and for making this type of forum available to all of us. Sharon