There are numerous breathing techniques and tools available to use for complete improvement of all bodily functions. Researchers with Harvard have documented the benefits of regular simple, deep breathing, which include and are not limited to:

‡Reducing anxiety and depression

‡Lowering/stabilizing blood pressure

‡Increasing energy levels

‡Relaxing Muscle Tension

‡Decreasing feelings of stress

Beyond the practice of simple deep breathing, the ancient yogis described different types of rhythmic deep breathing techniques that can potentially have differing effects on the mind and body. In fact, many studies document the beneficial effects of yogic breathing in treating depression, anxiety, post-traumatic stress disorder, chronic destructive pulmonary disease and asthma. There are also theories that support the notion that by slowing down and controlling the breath, we can improve our longevity.

According to Sheila Patel, M.D. A regular daily practice of deep breathing is one of the best tools for improving your health and well-being. Performing one of these breath techniques twice daily for only three to five minutes can produce long-term benefits. You can also use them any time you are feeling stressed or notice that your breathing has become constricted. By training your body with a regular practice of deep breathing, you will begin to breathe more effectively even without concentrating on it.

A few examples of deep breathing can be found below:
 
Click on the image for a collection of breathing exercises.