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Energy expenditure
and ventilatory responses during Virasana--a yogic standing posture.
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Indian
Journal of Physiology and Pharmacology.
1993
Jan;37(1):45-50.
Rai
L, Ram K.
Department of Physiology,
Central Research Institute for Yoga, New Delhi.
Energy expenditure and
ventilatory responses to yogic standing posture of Virasana were studied
on 10 healthy men (25-37 years of age). The results of various responses
respectively to the horizontal supine, Chair-sitting and Virasana were:
Minute Ventilation (VE) 7.64, 8.61 and 18.67 L/min; Respiratory Frequency
(FR) 15.71, 15.70 and 21.45 Breath/min; Tidal Volume (VT) 0.496, 0.544 and
0.827 L/min; Oxygen consumption (VO2) 0.127, 0.234 and 0.573 L/min;
Carbondioxide Elimination (VCO2) 0.127, 0.134 and 0.420 L/min; Respiratory
Exchange Ratio (RER) 0.58, 0.57 and 0.69; Heart Frequency (FH) 65.2, 74.5
and 104.4 beats/min; Oxygen Pulse (O2P) 3.32, 3.17 and 5.45 ml/beat;
Ventilatory Equivalent (VE-EQ) 36.78, 37.12 and 33.85; Multiple of Resting
VO2 (METS) 0.96, 1.05 and 2.53 and Metabolic Cost (MC) 1.04, 1.13 and 2.76
Cal/min. Virasana posture was characterised by higher VE, FR, VT, VO2,
VCO2, FH and O2P with lesser VE-EQ. The observations suggest that Virasana
induces temporarily a hypermetabolic state characterised by enhanced
sympathetic nervous system activity which gets inhibited during the
adoption of resting supine shavasana posture.
Research
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