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A study on modulation on cardiovascular response to yoga training

Authors:Revathi M, Ambareesha.komdam, Madhuri BA, Suresh M
Int J Biol Med Res. 2012; 3(2): 1662 – 1666  |  PDF File

Abstract

Practice of breathing exercises like Pranayama is known to improve autonomic function by changing Sympathetic or Parasympathetic activity. Specific breathing exercises had continuous good improvement in Respiratory Endurance in patients suffering Bronchial Asthma. This study was designed to quantity and compare the instantaneous heart rate dynamics and cardiopulmonary interactions during sequential performance of one Yogic meditation breathing patterns with different Protocols, Beat to beat heart rate variance and continuous breathing signals from 20 experienced subjects (10 Males; 10 Females;) was assessed. The mean age was 21 years during two traditional meditations. The experienced groups were subjects practicing pranayama for duration to 2-3years.The autonomic functions of the cardiovascular system of the subjects were assessed in detail. P–Value< 0.05 was considered to be statistically significant , Our results showed no significant change in resting heart rate ( P > 0.05 ) but there was significant increase in Deep breathing test ( P < 0.05 ), Postural tachycardia index ( P < 0.01 ) and Valsalva’s ratio ( P < 0.01 ). These findings suggest that different meditative breathing protocols may evoke common heart rate effects, as well as specific responses. The results support the concept of a “Meditation Paradox”, since a variety of relaxation and meditative techniques may produce active rather than quiescent cardiac dynamics, associated with prominent low frequency, heart rate oscillation or increases in mean resting heart rate. These findings also underscore the need to critically assess traditional frequency domain heat rate variability parameters in making inferences about autonomics alterations during meditation with slow breathing.