My wife is very weak and due to lot excertion she

Sat Nam,

The practice of yoga can help you balance your weight. For some persons it is natural to weight more than for others, depending on their lifestyle, daily activity, constitution, diet….

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

You can try these exercises to balance your weight.

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

And this to strenghten the immune system

http://s3cr3ty0stg2.wpengine.com/newsletter/03-15/BreathMeditation.html

Blessings