In a study published in Applied Psychophysiology and Biofeedback, March, 2008, participants using a portable Respiratory Sinus Arrhythmia (RSA) biofeedback trainer reported a significant reduction in anxiety, anger and sleep disturbances. They found the device more helpful than other relaxation techniques, such as meditation, yoga, and unassisted breathing techniques.
These devices guide the participant to synchronize slow, controlled breathing with heart rate. Many of my patients have reported benefits from using the Emwave or the Stress Eraser.
