According to an Associated Press story covered on ABC News , yoga is catching on in military circles. Soldiers are finding the healthful benefits of stretching and deep breathing to not only release stress but also to help repair injuries and strengthen backs. It can also be used in increasing flexibility. As the article stated, it is unlikely that you will see soldiers doing yoga on the battlefield.
I've read articles on how one can do yoga in your airplane seat and at your desk. Why not on the battlefield?