I also want to thank you for the question and answer service you provide. It has been very helpful to me to be able to get answers to my questions, also to hear other's questions answered. In regards to the lunging forward on the sun salute, what are some ways of strengthening the hip flexors? Another question if I may: In the joint freeing exercises, one of my students can roll her feet so that the soles meet, but she can't do the opposite at all. What would inhibit that action, and what would be the consequence of not being able to do that? What i was talking about is the joint freeing exercise in Dandasana where you roll the feet (pronation?), first so that the soles come together, then the big toe side stretches away as the pinkie side comes toward you so that the soles of the feet are on the outside (supination?). This is the action that my student cannot get. Thanks again, Hiyalah.