Alternate nostril breathing is a very beneficial exercise to calm the mind and body. It can be used as a form of meditation and is great for reducing stress, tension and anxiety within the body.
Another useful benefit that it offers is that it reduces the effects of dizziness and vertigo. As we alternate our breathing with each nostril, we are balancing both hemispheres of the brain. Throughout the day we predominately breathe through one nostril. If we breathe through one nostril for too long, we can have more dominance in one hemisphere of the brain.
Alternate nostril breathing helps to bring balance to the brain and body. Start to perform this exercise for 30 seconds a day and gradually increase the duration as you become more comfortable with the exercise.
As this a very powerful exercise, it's important not to overdo things when starting off, so take your time with performing this exercise.
http://www.curevertigonow.com/how-to-perform-alternate-nostril-breathing-for-vertigo/