Division of Yoga and Life Sciences, Department of Research and Development, S-VYASA University, Bengaluru, Karnataka, India.
Department of Neurology, Aster CMI Hospital, Cauvery Medical Centre, Bengaluru, Karnataka, India.
Appl Psychophysiol Biofeedback. 2018 Mar;43(1):87-92. doi: 10.1007/s10484-017-9387-8.
Various pranayama techniques are known to produce different physiological effects. We evaluated the effect of three-different pranayama techniques on cerebrovascular hemodynamics. Eighteen healthy volunteers with the mean ± standard deviation age of 23.78 ± 2.96 years were performed three-different pranayama techniques: (1) Bhramari, (2) Kapalbhati and (3) Bahir-Kumbhaka in three-different orders. Continuous transcranial Doppler (TCD) monitoring was performed before, during and after the pranayama techniques. TCD parameters such as peak systolic velocity, end diastolic velocity (EDV), mean flow velocity (MFV) and pulsatility index (PI) of right middle cerebral artery were recorded. Practice of Kapalbhati showed significant reductions in EDV and MFV with significant increase in PI while, Bahir-Kumbhaka showed significant increase in EDV and MFV with significant reduction in PI. However, no such significant changes were observed in Bhramari pranayama. Various types of pranayama techniques produce different cerebrovascular hemodynamic changes in healthy volunteers.
各种呼吸技巧已知会产生不同的生理效应。我们评估了三种不同呼吸技巧对脑血管血液动力学的影响。18 名健康志愿者的平均年龄为 23.78 ± 2.96 岁，进行了三种不同的呼吸技巧：（1）Bhramari，（2）Kapalbhati 和（3）Bahir-Kumbhaka，以三种不同的顺序进行。在呼吸技巧之前、期间和之后进行连续经颅多普勒（TCD）监测。记录右侧大脑中动脉的收缩期峰值速度、舒张末期速度（EDV）、平均血流速度（MFV）和搏动指数（PI）等 TCD 参数。Kapalbhati 的练习显示 EDV 和 MFV 显著降低，PI 显著增加，而 Bahir-Kumbhaka 则显示 EDV 和 MFV 显著增加，PI 显著降低。然而，Bhramari 呼吸法没有观察到这种显著变化。各种类型的呼吸技巧在健康志愿者中产生不同的脑血管血液动力学变化。
