Go means cow, mukha is face. This posture is a fairly deep stretch for the hips, legs and shoulders. An asana beneficial for high blood pressure patients.
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Yogendra Pranayam VI – Prolonged Inhalation(Puraka)
Yogendra Pranayam is a practice concerned with breath control. Learn the technique of prolonged inhalation. It improves the lung capacity and aids in relaxation of heart.