I must admit that sometimes I do not control my breathing and the times I have tried to control it, it has worked out positively. In moments of anguish or stress, when I feel that my heart feels like a runaway horse and I hear it as if it were in my ears, I start to slow down my heart rate through my breathing. I inhale and exhale, inhale and exhale slowly and controlled and so I calm down. Thanks for the links, I will check them out. Hug, Eric