Hasta Utthanasana (raised arm pose) is a light posture for enriching the upper body with energy. Introducing the flexion and extension of the cervical spine (neck) motivates the energetic stimulation of vishuddhi chakra, the seat of the intuitive nature of the human being.
Awakening vishuddhi chakra leads towards a superhuman state of consciousness which is liked to the intuitive disposition of human nature. In most people this higher state of being is dormant, suppressed by individualistic thinking and egocentric ideologies. Through this practice you can begin to connect to the energy in and surrounding vishuddhi chakra which will aid in meditation upon the intuitive center.
Physiologically and anatomically this posture helps to correct postural miladies including rounded shoulders and stiffness in the upper back. Moving the arms, head, and breath in a rhythmical cycle increases breath capacity and relaxes the mind. This posture also helps to improve circulation especially to the coronary arteries.