Scientific Background

David O’Hare , a French Canadian MD and psycho therapist has used Heart Rate Coherence methods and published on it.
1/ Heart Coherence 365 which is a Kindle Book you can buy for $4.95 from Amazon  and download to and read on your computer.

2/ You can watch a preview of his course and clicking on the Play button on the top right corner of the display above “Preview this course”.

3/ You can take his course     for  about $60