All forms of meditation involve over breathing or controlled hyperventilation. This takes more carbon dioxide out of the blood in the form of carbonic acid which will make the blood more alkaline.  This will have a relaxing affect on the body and tend to slow down ones metabolism.   Hyperventilation is not healthy when taken to extremes or when out of control, but that is true with so many things.  The medical community seems to see only the negative side of hyperventilation at this time.  The medical community often just focuses on unhealthy people and have not done enough studies of  meditative practitioners that benefit from using controlled hyperventilation in their breathing techniques.  One can find articles on the internet that challenge the way the medical community view all forms of hyperventilation.  The medical community can scare people from doing what it takes to get the most benefits from meditative…