"The heart is a primary generator of rhythmic patterns in the human body and possesses a more extensive communication system with the brain than do other major organs. In addition the heart plays a particularly important role in the generation of emotion. ...The research team at the Institute of HeartMath has shown that techniques which combine intentional heart focus with the generation of sustained positive feelings lead to a beneficial mode of physiological function they have termed psycho-physiological coherence." Quantumintech
Positive feelings and smooth, even heart rhythms facilitate or improve the brains ability to process information; this is called cortical facilitation. When the brain and heart work harmoniously an athletes physical reflexes are faster and he/she will be able to focus, think and make clear decisions and enable muscular coordination. Players still need to have the skills, abilities and talent to perform the task. If your technique is inefficient you will still need to develop this area to improve performance. (Sorry no miracles :-).....
EmWave Case Study: Nine U.S.T.A. League tennis players. Nine EmWaves ( a portable biofeedback devise)....instructions on how to use the EmWave and one month documenting their use (time and frequency) to explore if using the EmWave at least five times a week, for at least five minutes per time would aid in reducing cognitive anxiety, somatic anxiety, improve players self-confidence and enjoyment of competition. Levels of anxiety and self-confidence were measured by having the players complete the "Competitive State Anxiety Inventory" (slightly modified) as a pre-test. The group took the same test again after a month of using the device.....
The case study findings were significant....for a detailed description of this case study check http://www.sportshealthcounseling.com/
under "Projects and Results." Complete details of the study will be posted by the end of July.