Heart Rate variability (HRV) is a measure of beat-to-beat changes in heart rate. It indicates how well the heart responds to changes in the body controlled by the autonomic (parasympathetic and sympathetic) nervous system. HRV is high in healthy people and reduced in those with heart disease. Now research reports that HRV is higher in people who regularly practice yoga.
The study, to be published in the International Journal of Medical Engineering and Informatics, investigated whether yoga practice may improve heart health. Researchers at the Indian Institute of Technology in Roorkee, Uttrakhand, India, analyzed HRV spectra of the electrocardiograms (ECG) of 42 healthy, experienced yoga practitioners and 42 healthy non-yoga practitioners (ages 18 to 48).
The researchers found that parasympathetic (vagal) control was stronger in the yoga practitioners, compared with the non-yoga practitioners. Strong vagal control suggests better autonomic control over heart rate and a healthy heart.
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