The Mystery of Shri Hanuman with Five Heads:
Vaishnavas believe that the wind-god Vayu underwent three incarnations to help Lord Vishnu. As Hanuman he helped Rama; as Bheema he assisted Krishna; and as Madhavacharya he founded the Vaishnava sect.
It is interesting to note that in his youth Shri Madhavacharya distinguished himself in physical exercises and field games and is said to have had a wonderful physique. Truly, physical prowess is an integral aspect of the cult of Hanuman and he is the patron deity of wrestlers and body-builders. He is most popularly referred to as ‘Vajra-anga-Bali,’ meaning the Powerful One (bali) with a body (anga) hard as a thunderbolt (vajra).