Research studies have shown that yoga can modulate autonomic functions. Hence, the current study was designed to assess the effect of yoga on cardiac autonomic activity. 100 healthy volunteers (M78:F22) from age group 17-26 years were included in the study. They practiced some yogic exercises including Asanas, Pranayam & relaxation techniques daily one hour for 3 months. Cardiovascular autonomic function tests parameters including Resting heart rate (HR), Blood Pressure (SBP, DBP), rate pressure product (RPP) and double product (DoP), heart rate response to deep breathing (E: I ratio), valsalva maneuver (VR) and pressure response to cold pressor test (CPT) were studied before and after 3 months of yoga training. Result showed significant reduction in heart rate (p<0.01), SBP (p<.05), RPP & DoP (p<.01) and E: I ratio increased significantly while valsalva ratio (VR) did not change significantly after the yoga training (P>0.05). In cold pressor test (CPT) rise in SBP (?SBP) and rise in DBP (?DBP) was significantly decreased in response to cold water after 3 months of yoga training. These findings suggest that, Yoga training improved autonomic functions in healthy volunteers.
Yoga, Autonomic functions, E: I ratio, VR, CPT
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