Key result
Obesity was associated with lower endothelial vasodilatator function compared to lean subjects (3.2% vs 5.7%; P<.01), while low cardiorespiratory fitness correlated with reduced arterial compliance.
Why the study?
How do obesity and cardiorespiratory fitness relate to markers of arterial function such as endothelial vasodilator function and arterial compliance?
Cross-Sectional (n=53)
How do obesity and cardiorespiratory fitness relate to markers of arterial function such as endothelial vasodilator function and arterial compliance?
Obesity impairs endothelial function (FMD), whereas low cardiorespiratory fitness is associated with reduced large artery compliance, indicating distinct influences on blood vessel health.
Answers are grounded in this paper and cite their sources.
May warrant targeted vascular assessment in obesity; leaves open distinct fitness effects on compliance.
Background. Obesity and low cardiorespiratory fitness (CRF) have been shown to independently increase the risk of CVD mortality. The aim of this study was to investigate the relationship between CRF, body fatness and markers of arterial function. Method and Results. Obese (9 male, 18 female; BMI 35.3 ± 0.9 kg·m(-2)) and lean (8 male, 18 female; BMI 22.5 ± 0.3 kg·m(-2)) volunteers were assessed for body composition (DXA), cardiorespiratory fitness (predicted V˙O2max), blood pressure (BP), endothelial vasodilatator function (FMD), and arterial compliance (AC) (via radial artery tonometry). The obese group had more whole body fat and abdominal fat (43.5 ± 1.2% versus 27.2 ± 1.6%; P < .001 and 48.6 ± 0.9% versus 28.9 ± 1.8%; P < .001, resp.), and lower FMD (3.2 ± 0.4% versus 5.7 ± 0.7%; P < .01) than the lean subjects, but there was no difference in AC. AC in large arteries was positively associated with CRF (R = 0.5; P < .01) but not with fatness. Conclusion. These results indicate distinct influences of obesity and CRF on blood vessel health. FMD was impaired with obesity, which may contribute to arterial and metabolic dysfunction. Low CRF was associated with reduced elasticity in large arteries, which could result in augmentation of aortic afterload.
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Davison et al. (2010) conducted a cross-sectional in Obesity (n=53). Obesity vs. Lean subjects was evaluated on Endothelial vasodilatator function (FMD) (p=<.01). Obesity was associated with lower endothelial vasodilatator function compared to lean subjects (3.2% vs 5.7%; P<.01), while low cardiorespiratory fitness correlated with reduced arterial compliance.
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