Thinking about the energetics of poses: by energetics, I am referring to the way we use the energy of the body to deepen or stabilize a pose. Warrior II pose comes to mind as a strong example of where this can be seen in the beginning stages of yoga.
“Warrior II requires lots of strength and stability, but also flexibility in the hips and upper body. This teaches us about one of the key principles of yoga asana practice; the balance of sthira and sukha or steadiness and ease. It also teaches us to involve the whole body in asana, and to remember that which is out of sight.”