the Tree pose – Vrikshasana
The balancing postures on one leg are mentally highly demanding. These postures develop, to the highest degree, the powers of mental concentration and single-mindedness of thought, as well as physical balance.
Practising this asana brings a wonderful feeling of inner peace and concentration. Poised on one leg with the other foot as high up as half lotus, or at ankle or knee height. The hands pressed together in prayer position, in front of the chest or stretched up above the head.
It also improves the muscle strength in the standing leg, keeping the back and spine straight. Therefore always practice on both sides, even though usually one side is easier than the other.
Hatha Yoga Ipswich 