Device-guided slow breathing alters postprandial oxidative stress in young adult males: A randomized sham-controlled crossover trial

Slow, deep breathing (SDB) lowers blood pressure (BP) though the underlying mechanisms are unknown. Redox improvements could facilitate hemodynamic adjustments with SDB though this has not been investigated. The purpose of this randomized, sham-controlled trial was to examine the acute effects of SD...

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Published in:Nutrition, metabolism, and cardiovascular diseases metabolism, and cardiovascular diseases, 2023-01, Vol.33 (1), p.203-209
Main Authors: Hunter, Stacy D., Bernardi, Luciano, McAllister, Matthew J., John, Dinesh, Rahimi, Mitra, Lopez, Micqauella R.
Format: Article
Language:English
Subjects:
Adolescent
Adult
Blood Glucose - metabolism
Cross-Over Studies
Diet
Endothelial function
Endothelium, Vascular
Humans
Male
Oxidative Stress
Postprandial Period - physiology
Slow breathing
Thiobarbituric Acid Reactive Substances - analysis
Thiobarbituric Acid Reactive Substances - metabolism
Thiobarbituric Acid Reactive Substances - pharmacology
Young Adult
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Summary:Slow, deep breathing (SDB) lowers blood pressure (BP) though the underlying mechanisms are unknown. Redox improvements could facilitate hemodynamic adjustments with SDB though this has not been investigated. The purpose of this randomized, sham-controlled trial was to examine the acute effects of SDB on oxidative stress and endothelial function during a physiological perturbation (high-fat meal) known to induce oxidative stress. Seventeen males (ages 18–35 years) were enrolled, and anthropometric measurements and 7-day physical activity monitoring were completed. Testing sessions consisted of 24-h diet recalls (ASA24), blood sample collection for superoxide dismutase (SOD) and thiobarbituric acid reactive substances (TBARS) analysis, and flow-mediated dilation (FMD). High-fat meals were ingested and 2-min breathing exercises (SDB or sham control breathing) were completed every 15 min during the 4-h postprandial phase. Blood sample collection and FMD were repeated 1-, 2-, and 4-h post meal consumption. Mean body mass index and step counts were 25.6 ± 4.3 kg/m2 and 8165 ± 4405 steps per day, respectively. Systolic and diastolic BP and nutrient intake 24 h prior were similar between conditions. No time or time by condition interaction effects were observed for FMD. The total area under the curve (AUC) for SOD was significantly lower during SDB compared to the sham breathing condition (p 
ISSN:0939-4753
1590-3729
1590-3729
DOI:10.1016/j.numecd.2022.10.002