how to gain the weight? Is there any yoga by which

Sat Nam,

You can practice the exercises on the link to balance your weight

http://s3cr3ty0stg2.wpengine.com/newsletter/05-16/yoga-exercises-to-loss-weight.htm

http://s3cr3ty0stg2.wpengine.com/yoga-articles/advice-for-good-nutrition.html

Blessings