The invention provides a method and system for bringing an exercising human subject to the state of optimal psycho-physical functioning, in effect the “runner's high”, by facilitating the state of heart rate variability coherence while the subject is exercising. This is achieved by synchronization...http://www.google.co.uk/patents/US20050240114?utm_source=gb-gplus-sharePatent US20050240114 - Method and system for achieving heart rate variability coherence during exercise
