This is an excellent grounding pose for excessive air or vatta. The chakras that illuminate with this pose are the first, second and sixth. The breath concentration is samana (belly circular), prana (chest) and apana (downward). Key points to remember in this pose is to align knee and ankle of forward leg while hugging muscle to bone. The pelvis should remain square while creating a straight line of energy from the back heel through the spine to the crown of the head. With each inhalation visualize a spiral of energy moving into the chest through the crown of the head. With each exhalation, feel apana vayu cleansing and purifying as it moves down and out of the base of the body. This pose is very helpful for sciatica and digestive issues.