Sex-specific microvascular and hemodynamic responses to passive limb heating in young adults
Traylor MK, Batman GB, Sears KN, Ransom KV, Hammer SM, Keller JL
Microcirculation (New York, N.Y. : 1994) · 5 citations
Review labels
Neutral facts our review recorded about how this study was done. They describe method, never whether we like the result.
How it was studied
- Design
- Randomized controlled trial (classified by our AI screen)
- Studied in
- People
- Main outcome
- Health markers and function
Who paid for it
- Funding
- Funding not disclosed
Publication
- Published
- 2024-01-28 · Microcirculation · vol. 31 · issue 4 · p. e12848
- Publisher
- Wiley
- Cited
- 6 citations · more than 84% of similar papers · 1.7× the field average
- References
- 67 works
- Access
- Paywalled
- Research areas
- Heart Rate Variability and Autonomic Control · Thermoregulation and physiological responses · Cardiovascular and exercise physiology
- Keywords
- Blood flow, Hemodynamics, Medicine, Brachial artery, Analysis of variance, Cardiology, Forearm, Internal medicine, Oxygenation, Vasoconstriction, Anatomy, Blood pressure
- MeSH
- muscle, skeletal, brachial artery, microcirculation, humans, spectroscopy, near-infrared, oxygen consumption, sex characteristics, regional blood flow, adult, female, male, hemodynamics, hot temperature
6 authors
From US
- Miranda K. TraylorUniversity of South Alabama
- Genevieve B. BatmanUniversity of South Alabama
- Kylie N. SearsOklahoma State University
- Kyndall V. RansomUniversity of South Alabama
- Shane M. HammerOklahoma State University
- Joshua L. Keller · correspondingUniversity of South Alabama
Abstract
Objective
We examined sex-specific microvascular reactivity and hemodynamic responses under conditions of augmented resting blood flow induced by passive heating compared to normal blood flow.
Methods
Thirty-eight adults (19 females) completed a vascular occlusion test (VOT) on two occasions preceded by rest with or without passive heating in a randomized, counterbalanced order. Skeletal muscle tissue oxygenation (StO2, %) was assessed with near-infrared spectroscopy (NIRS), and the rate of desaturation and resaturation as well as maximal StO2 (StO2max) and prolonged hypersaturation (area under the curve, StO2AUC) were quantified. Before the VOT, brachial artery blood flow (BABF), vascular conductance, and relative BABF (BABF normalized to forearm lean mass) were determined. Sex × condition ANOVAs were used. A p-value ≤.05 was considered statistically significant.
Results
Twenty minutes of heating increased BABF compared to the control (102.9 ± 28.3 vs. 36.0 ± 20.9 mL min-1; p -1; p -1; p 2max than females.
Conclusions
These results suggest that blood flow is not the primary factor causing sex differences in NIRS-VOT outcomes.
Abstract via Europe PMC. Copyright remains with the authors or publisher.
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