“The best Āsana for doing Bandha are inverted, lying flat, or sitting with the back straight.
A classic posture is Mahā Mudrā, which is in fact, Mahā Mudrā only if the Bandha are used.”
– TKV Desikachar ‘The Concept, Preparation and Techniques of Bandha’
Religiousness in Yoga Chapter Fourteen Page 200