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Department of Integrative Physiology and Cardiovascular Research Institute, University of North Texas Health Science Center, Fort Worth, Texas 76107
Are women more susceptible to
acute postexercise orthostatic hypotension compared with men? We
hypothesized that decreases in arterial pressure during recovery from
dynamic exercise are greater in women compared with men. We
studied 8 men and 11 women during inactive and active recovery from
cycling exercise. Heart rate, stroke volume (SV), cardiac output, mean
arterial pressure (MAP), and total peripheral resistance (TPR) were
measured during and after 3 min of exercise at 60% of calculated
maximum heart rate. At 1 min after exercise, MAP decreased less
(P < 0.05) during inactive recovery in men (
18 ± 2 mmHg) compared with women (
30 ± 2 mmHg). This difference
was due to greater decreases in SV and less increase in TPR during
inactive recovery from exercise in women compared with men. These
differences persisted for 5 min after exercise. MAP decreased less
during active recovery in men compared with women. These findings
suggest that women may have increased risk of postexercise orthostatic
hypotension and that active recovery from exercise may reduce this risk.
blood pressure; human; muscle pump; hemodynamics; sex
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