International Journal of Yoga

ORIGINAL ARTICLE
Year
: 2022  |  Volume : 15  |  Issue : 1  |  Page : 19--24

Cerebrovascular dynamics associated with yoga breathing and breath awareness


Ankur Kumar, Niranjan Kala, Shirley Telles 
 Division of Yoga and Clinical Neurophysiology, Patanjali Research Foundation, Patanjali Yogpeeth, Haridwar, Uttarakhand, India

Correspondence Address:
Shirley Telles
Patanjali Research Foundation, Patanjali Yogpeeth, Haridwar - 249 405, Uttarakhand
India

Aims: Breath frequency can alter cerebral blood flow. The study aimed to determine bilateral middle cerebral arterial hemodynamics in high-frequency yoga breathing (HFYB) and slow frequency alternate nostril yoga breathing (ANYB) using transcranial Doppler sonography. Methods: Healthy male volunteers were assessed in two separate trials before, during, and after HFYB (2.0 Hz for 1 min, n = 16) and ANYB (12 breaths per minute for 5 min, n = 22). HFYB and ANYB were separately compared to breath awareness (BAW) and to control sessions. Statistical Analysis: The data were analyzed using repeated-measures ANOVA with Bonferroni adjusted post hoc tests. Results: During HFYB there was a decrease in end-diastolic velocity (EDV) and mean flow velocity (MFV) (P < 0.01 for left and P < 0.05 for right middle cerebral arteries; MCA) with an increase in pulsatility index (PI) for the right MCA (P < 0.05). During ANYB, there was a bilateral decrease in peak systolic velocity (P < 0.05 for left and P < 0.01 for right MCA), EDV (P < 0.01) and MFV (P < 0.01 for left and P < 0.001 for right MCA) and an increase in PI (P < 0.01). During BAW of the two sessions there was a decrease in lateralized flow and end-diastolic velocities (P < 0.05) and an increase in PI (P < 0.05). Conclusions: Changes in peak flow velocities and pulsatility indices during and after HFYB, ANYB, and BAW suggest decreased cerebrovascular blood flow and increased flow resistance based on different mechanisms.


How to cite this article:
Kumar A, Kala N, Telles S. Cerebrovascular dynamics associated with yoga breathing and breath awareness.Int J Yoga 2022;15:19-24


How to cite this URL:
Kumar A, Kala N, Telles S. Cerebrovascular dynamics associated with yoga breathing and breath awareness. Int J Yoga [serial online] 2022 [cited 2022 Jun 28 ];15:19-24
Available from: https://www.ijoy.org.in/article.asp?issn=0973-6131;year=2022;volume=15;issue=1;spage=19;epage=24;aulast=Kumar;type=0