The key to transforming stress lies in your power to regulate your emotions and perceptions. That power comes from your heart. You can learn how to engage your heart rhythms to manage your emotions and perceptions, even when they are flaring, and bring your system back to inner harmony.

Biofeedback is a process that enables an individual to learn how to  change physiological activity for the purposes of improving health and  performance. Precise instruments measure physiological activity such as  brainwaves, heart function, breathing, muscle activity, and skin  temperature. These instruments rapidly and accurately "feed back"  information to the user. The presentation of this information—often in  conjunction with changes in thinking, emotions, and behavior—supports  desired physiological changes. Over time, these changes can endure  without continued use of an  instrument. - Association for Applied Psychophysiology and Biofeedback 

Dr. Claypool is a HeartMath Certified Practitioner. HeartMath biofeedback specifically focuses on heart rhythm patterns to create a state of "physiological coherence." We now know that heart rhythms have a significant effect on brain function – influencing emotional processing as well as higher cognitive faculties such as attention,  perception, memory, and problem-solving. HeartMath biofeedback gives clients the ability to create this state of coherence first in office, and then overtime in their lives. HeartMath biofeedback has been found to be an effective treatment for many mental health conditions, stress, headaches and migraines, and has a strong evidence base for use in performance enhancement.