In yoga, asana refers both to the place in which a practitioner (yogi if male, yogini if female) sits and the posture in which he or she sits.
In the Yoga Sutras, Patanjali defines "asana" as "to be seated in a position that is firm, but relaxed".There are about 84 lakh asanas in Yoga.
Benefits of asanas: Along with physical fitness, asanas improve mental and spiritual fitness. They improve the physical and mental balance. They are also helpful in body flexibility and body building. Yogasanas are the ultimate resort for prevention and cure of many health problems.