Tadasana
/ Mountain pose (Basic standing pose)
:

Stand with the feet together and the legs straight. Lift the arches of the feet and the kneecaps. Gently pull in the lower abdomin. Point the crown of the head to the ceiling directly above. The shoulders should fall to the sides neither forward nor back. There should be a gap of about three or four inches between the shoulder blades. Let the arms relax hanging at the sides. Keep the eyes gently focused directly ahead. Relax the tongue and throat muscles.
Tadasana is the basic posture from which all standing postures begin and return to. It is similar to the anatomical position except the palms of the hands face medially. It should achieve correct standing lordosis that is carried into the appropriate movements of other standing postures.
The ideal posture in standing should when viewed from the side should
have specific points that are aligned with an ‘ideal plumb line’ that is a line
that is dropped through the body along the centre of gravity. The line should pass approximately through
the ear lobe, the acromion process, midway through the trunk, through the
bodies of the lumbar vertebrae, the greater trochanter of the femur, slightly
anterior to the mid line of the knee and sightly anterior to the lateral
malleolus. Weight bearing segments of the body should be aligned so that the
line of gravity passes through these segments within a given range. The line of
gravity should intersect with the base of support close to the geometric centre
of the base of support in order to maintain stability.
Weight bearing joints should maintain an easy, balanced extension
without strain or tension. There is an optimum level of energy expenditure for
maintenance of good alignment. Too little energy will result in depending on
ligaments of weight bearing joints rather than using muscles to resist gravity.
Excess energy expenditure indicates poor neuromuscular coordination. Good
posture should allow mechanically efficient function of joints, minimise
friction and balance opposing ligaments and soft tissue in order to minimum
wear and tear on joints. Adequate development of anti‑gravity muscles
should enable them to resist the pull of gravity and maintain good alignment
without excessive tension and effort. Flexibility in structures of weight
bearing joints should permit good alignment without strain. The overall posture
should facilitate the functioning of the internal organs.