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  • Title: Differences in arterial stiffness at rest and after acute exercise between young men and women.
    Author: Doonan RJ, Mutter A, Egiziano G, Gomez YH, Daskalopoulou SS.
    Journal: Hypertens Res; 2013 Mar; 36(3):226-31. PubMed ID: 23051656.
    Abstract:
    There is controversy as to whether there are sex differences in arterial stiffness. Acute physical stress can elicit vascular abnormalities not present at rest. Our objective was to assess sex differences in arterial stiffness at rest and in response to acute physical stress. Healthy young men (n=67) and women (n=55) underwent pulse wave analysis and carotid-femoral pulse wave velocity measurements at rest and 2, 5, 10 and 15 min following an exercise test to exhaustion. At rest, aortic systolic, diastolic, pulse and mean pressures were all significantly higher in men as was aortic pulse pressure at 10 and 15 min post exercise and aortic systolic pressure at 15 min. Carotid-femoral pulse wave velocity was significantly higher in men (6.0±0.7 m s(-1) vs. 5.6±0.6 m s(-1), P=0.03) at rest and at all time points post exercise. Heart rate-adjusted augmentation index was significantly lower (-10.7±10.2% vs. -4.0±10.9, P<0.0001) and subendocardial viability ratio was significantly higher (176.2±43.8% vs. 163.4±40.9, P=0.04) in men at rest. To our knowledge, this is the first study to assess sex differences in the arterial stiffness response to acute physical stress in young men and women. Although we were not able to elicit differences in vascular function after adjustment, which were not present at rest, we found that young men and women exhibit differences in arterial stiffness at rest and after acute physical stress.
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