Core and Spine – gentle control is the key
If you are already a Yoga teacher, you may notice that some of your students are great at all of the asana that require flexibility, (it may even be what drew them to Yoga in the first place), but lack strength in say Kumbakasana (Plank) held for any length of time. And you may notice that no amount of Navasana (Boat) seems to be getting to their core muscles. It might be that you are simply asking them to gather strength in a part of their body that they have no idea how to