Why the study?
Mixed results exist regarding fitness- and sex-related differences in FMD, and little is known about microvascular differences in untrained versus chronically trained males and females.
Do fitness level and sex affect macrovascular and microvascular responses during reactive hyperemia?
Comparison
Chronically trained vs untrained individuals across male and female sexes
Design
Cross-sectional physiological study
Key result
Chronic training was associated with greater peak blood flow (P≤0.0001) and faster microvascular desaturation and reperfusion rates compared to untrained individuals, despite no difference in %FMD.
Loading...
Combined NIRS-VOT and hyperemia measures may detect fitness-related vascular differences missed by %FMD alone; leaves open clinical utility and causality.
Cross-Sectional (n=31)
Do fitness level and sex affect macrovascular and microvascular responses during reactive hyperemia?
Integrating NIRS-VOT and reactive hyperemia blood flow outcomes identifies fitness- and sex-related differences in vascular function that are not detected by %FMD alone.
A 2021 study reported a cross-sectional. Chronic training vs. Untrained was evaluated on Flow-mediated dilation (%FMD). Chronic training was associated with greater peak blood flow (P≤0.0001) and faster microvascular desaturation and reperfusion rates compared to untrained individuals, despite no difference in %FMD.