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Nasal breathing lowers BP and may reduce risk factors for cardiovascular disease: Study

Written By : Dr. Kamal Kant Kohli Published On 2024-01-22T10:15:46+05:30  |  Updated On 22 Jan 2024 1:40 PM IST
Nasal breathing lowers BP and may reduce risk factors for cardiovascular disease: Study
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USA: Breathing through the nose leads to several benefits, including lower blood pressure and other factors that could predict heart disease risk, new research has revealed. The study, published in the American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, was chosen as an APSselect article for January.

More than half of adults living in the U.S. label themselves as “mouth breathers”-breathing primarily through an open mouth.

Cardiovascular disease is the number one cause of death in the U.S. Blood pressure and heart rate can be predictors of heart disease. Breathing patterns can affect these bodily functions due to the crosstalk that occurs between the respiratory and cardiovascular systems. Nasal breathing has been shown to relax the airways and improve breathing efficiency, but the effects of breathing through the nose on the cardiovascular system are less clear.

A group of 20 young adult volunteers participated in a crossover study consisting of rest and exercise conditions. In the rest condition, the volunteers performed both nasal-only and mouth-only breathing activities in a randomized order. First, they sat quietly for five minutes and then breathed for five minutes at their own pace. Nasal breathing was performed with the lips closed; mouth breathing was done with soft nose clips to prevent nasal airflow.

The exercise condition was meant to mimic the activity of daily living of walking at a moderate pace at a slight incline. The volunteers breathed, also in a randomized order, at their rate for seven minutes while using a recumbent stationary bike. As with the rest condition, one activity involved mouth-only breathing and the other, nasal-only breathing. The research team measured the volunteers’ blood pressure, blood oxygen levels and heart rate during each condition.

The research team found that the volunteers’ diastolic blood pressure was lower when they breathed through the nose and a lower perceived rate of exertion than when they breathed through the mouth in the rest condition, but not exercise condition. In addition, nasal breathing shifted the nervous system into a more parasympathetic state (“rest and digest” rather than “flight or fight”) during the rest condition.

“We interpret the collective data to suggest that nasal compared with oral breathing provides modest, but potentially clinically relevant, improvements in prognostic cardiovascular variables at rest, but not during exercise,” the researchers wrote. “This work advances our knowledge of how nasal breathing affects clinically relevant cardiovascular variables and provides foundational acute data in healthy young adults to justify future longer-term studies in other populations.”

Reference:

Joseph C. Watso,Jens N. Cuba,Savannah L. Boutwell,Justine E. Moss, Acute nasal breathing lowers diastolic blood pressure and increases parasympathetic contributions to heart rate variability in young adults, https://doi.org/10.1152/ajpregu.00148.2023.

American Journal of Physiology-Regulatory Integrative and Comparative PhysiologyBlood PressureHeart Diseasenasal breathing
Source : American Journal of Physiology-Regulatory, Integrative and Comparative Physiology
Dr. Kamal Kant Kohli
Dr. Kamal Kant Kohli

Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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