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Acute effects of resonance frequency breathing on cardiovascular regulation

Citation

Pagaduan, J and Wu, SSX and Kameneva, T and Lambert, E, Acute effects of resonance frequency breathing on cardiovascular regulation, Physiological Reports, 7, (22) pp. 1-10. ISSN 2051-817X (2019) [Refereed Article]


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DOI: doi:10.14814/phy2.14295

Abstract

Acute slow breathing may have beneficial effects on cardiovascular regulation by affecting hemodynamics and the autonomic nervous system. Whether breathing at the resonance frequency (RF), a breathing rate that maximizes heart rate oscillations, induces differential effects to that of slow breathing is unknown. We compared the acute effects of breathing at either RF and RF + 1 breaths per minute on muscle sympathetic nervous activity (MSNA) and baroreflex function. Ten healthy men underwent MSNA, blood pressure (BP), and heart rate (HR) recordings while breathing for 10 min at their spontaneous breathing (SB) rate followed by 10 min at both RF and RF + 1 randomly assigned and separated by a 10‐min recovery. Breathing at either RF or RF + 1 induced similar changes in HR and HR variability, with increased low frequency and decreased high frequency oscillations (p < .001 for both). Both respiration rates decreased MSNA (−5.6 and −7.3 bursts per min for RF and RF + 1 p < .05), with the sympathetic bursts occurring more often during mid‐inspiration to early expiration (+57% and + 80%) and longer periods of silence between bursts were seen (p< .05 for RF + 1). Systolic BP was decreased only during RF (−4.6 mmHg, p < .05) but the decrease did not differ to that seen during RF + 1 (−3.1 mmHg). The sympathetic baroreflex function remained unchanged at either breathing rates. The slope of the cardiac baroreflex function was unaltered but the cardiac baroreflex efficiency was improved during both RF and RF + 1. Acute breathing at either RF or RF + 1 has similar hemodynamic and sympatho‐inhibitory effects in healthy men.

Item Details

Item Type:Refereed Article
Keywords:baroreflex, blood pressure, resonance frequency, sympathetic nervous activity
Research Division:Medical and Health Sciences
Research Group:Cardiorespiratory Medicine and Haematology
Research Field:Cardiology (incl. Cardiovascular Diseases)
Objective Division:Health
Objective Group:Clinical Health (Organs, Diseases and Abnormal Conditions)
Objective Field:Cardiovascular System and Diseases
UTAS Author:Pagaduan, J (Mr Jeffrey Pagaduan)
UTAS Author:Wu, SSX (Dr Sam Wu)
ID Code:136726
Year Published:2019
Deposited By:Health Sciences
Deposited On:2020-01-15
Last Modified:2020-01-15
Downloads:0

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