It is notable that our thumb and fingers resemble in size and strength the planetary aspects. The sun is the largest planet in our universe and it has the strongest influence on our life. Indeed, there can be no life without it. The density of the magnetic phase of the earth is only 25 OE, while that of the sun is 30 to 500 OE. So is the position of our thumb.

Physical ailments are the result of the disturbance in the equilibrium of the elemental forces of the body. The practice of the appropriate mudras can help us to overcome these disturbances and restore the proper balance.

The Linga mudra is said to make the body more resistant to colds and chest infections. Those who suffer from bad colds, incurable infections, congested chests and are prone to being affected adversely by the mildest changes in the weather, so they are advised to practise the Linga mudra. This mudra generates heat in the body and thus, while it "burns" away accumulated phlegm in the chest, it also makes the body more resilient to the cold.

This mudra is helpful in weight reduction too. However, because of the heat it generates, the mudra must not be practised with such flexibility as the Gyan mudra. It is taxing and can result in a feeling of lethargy. Weight-watchers who practice it must ensure that they eat fruits and ghee or butter. The advice may seem paradoxical but actually ghee and butter are cooling agents. Those who cannot afford or do not want to eat ghee are advised to drink lots of water, at least eight glasses a day.

The Linga Mudra comprises joining both the palms and locking the facing fingers together, keeping one thumb upright. The upright thumb must be encircled by the other thumb and index finger.