I have discovered all the research made by Esther Gokhale with a great interest.
I practice the Zhan Zhuang posture which is an old Qi gong exercise that Chinese martial artists do to build legs' strength, develop body proprioception, etc. You would stand still "like a tree" every day up to an hour.
In Zhan Zhuang posture*, the back should be flat while the knees are bent - cf picture. The feet are parallel (sometimes turned inwards), hip-width appart. The body is totally relaxed and as a consequence, the pelvis is expected to retrovert naturally (not through a contraction of the abs). The kua (or groins) should be soft. The glutts are relaxed. In addition, the breath should settle down in the abdomen (dan tian).
I thoroughly read the Lesson 6 - Tallstanding from 8 steps to a pain-free back and it appeared to me that the Zhan Zhuang posture doesn't quite fit the proper way of standing still. According to my understanding, the torso should bend a little bit forward (parallel to the lower legs), feet should be turned 10 to 15 degrees outwards, the gluteus should be actively engaged and the breathing should mainly take place in the ribcage while the inner corset is engaged.
I would be very happy to get a feedback on this topic so that I could adjust my Zhan Zhuang practice.
I would also like to know if you would be in favor of a standing meditation like Zhan Zhuang (or mountain pose in yoga or any other standing still posture) with the Gokhale principles of tall standing, or slightly modified.
Thank you in advance for sharing your opinion on this topic.
*Note : there are dozens of blogs and books written on the Zhan Zhuang topic with many more details and precision than my summary.