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Senthil Kumar, S
- Acute effect of Unilateral and Bilateral Nostril Breathing on Sympathovagal Balance in Yoga Practitioners and Healthy Male Volunteers
Authors
1 Department of Physiology, Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER) Puducherry
Source
International Journal of Physiology, Vol 1, No 2 (2013), Pagination: 112-116Abstract
Objective: To study the effect of deep breathing and single nostril breathing on the heart rate, blood pressure and frequency domain parameters of heart rate variability in yoga practitioners (pranayama) and healthy male volunteers.
Background: Heart rate variability (HRV) is used as an index of cardiac autonomic function. HRV is influenced even by one single deep breath. Ancient Sanskrit literature describes that autonomic balance is maintained by rhythmic alterations of airflow through the 2 nostrils. Studies have shown that sympathetic activity increases after breathing through right nostril and parasympathetic activity increases after breathing through left nostril breathing.
Method: Study was conducted in Autonomic lab, Department of Physiology, JIPMER, Puducherry, India. Healthy volunteers in the age group of 18-20 were included in group 1and the volunteers practicing yoga for 2 months were included in group 2. Subjects were asked to perform the following procedure: breathing at comfortable rate with both nostril, left nostril and right nostril, deep breathing with both nostrils, left nostril and right nostril at the rate of 6 breaths per min. All the procedure was done in supine position and 5 min ECG was recorded immediately after each procedure with the breathing at a comfortable rate involuntarily with both nostrils and HRV was analyzed.
Result: Deep breathing in all the 3 methods increases HRV both in control and yoga group. Deep breathing through both the nostrils increased parasympathetic activity (HRV) in both the groups. Left nostril breathing increased parasympathetic activity and decreased sympathetic activity and the right nostril breathing increased sympathetic activity and decreased parasympathetic activity in both the groups. The finding was observed in both the groups but it was more pronounced in yoga group.
Conclusion: Regular practice of yoga (pranayama) enhances the lateralizing effect of autonomic function.
Keywords
Yoga, HRV, Unilateral Nostril Breathing, Sympathovagal Balance
References
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- Comparative Study of effect of Slow and Fast Suryanamaskar on Work Load of Heart in Normal Human Subjects
Authors
1 Yoga Instructor, Plot No 27, 4th Cross st, Kurinji Nagar Extenstion, Lawspet, Pondicherry
2 Additional Professor, Department of Physiology, Jawaharlal Institute of Postgraduate Medical Education and Research, Pondicherry
3 Professor and Head, Department of Physiology, Mahatma Gandhi Medical College and Research Institute, Pondicherry
4 Senior Resident, Department of Physiology, Jawaharlal Institute of Postgraduate Medical Education and Research, Pondicherry
Source
International Journal of Physiology, Vol 1, No 2 (2013), Pagination: 166-169Abstract
Objective: To compare the work load on heart by slow and fast suryanamaskar.
Background: Suryanamaskar, an integral component of yoga is an excellent practice that stretches and tones the whole body. Various schools of yoga differ in the practice of suryanamaskar (SN). Some schools advocate performance in a slow manner in tune with slow breathing, while others advocate a rapid method of performing multiple rounds in a fast manner similar to physical exercise. It has been suggested that SN at different speeds provides different benefits. In the present study, we planned to determine the immediate effect of slow and fast suryanamaskar on heart rate and blood pressure of normal young volunteers.
Method: Thirty healthy school children were randomly divided into two groups of 15 each. Group I underwent training in fast suryanamaskar while group II were given training in slow suryanamaskar. Blood pressure and heart rate were determined before and immediately after the practice of suryanamaskar in both the groups.
Result: Fast suryanamaskar produced a significant increase in systolic pressure, pulse pressure and rate pressure product. On the other hand, slow suryanamaskar produced a significant decrease in diastolic pressure but there was no significant change in systolic pressure or rate-pressure product. Thus it was evident that the cardiovascular response to suryanamaskar depends on the manner in which it is performed. Slow suryanamaskar is non-taxing to the heart and hence can be prescribed to hypertensive patients and for rehabilitation of cardiac patients.
Conclusion: It is recommended that slow suryanamaskar may be used as a lifestyle component for school children and also for subjects with pre and stage I hypertension and mild degree cardiac patients undergoing rehabilitation.
Keywords
Suryanamaskar, Fast and Slow, Rate Pressure Product, Work LoadReferences
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