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J Appl Physiol (February 15, 2002). doi:10.1152/japplphysiol.00020.2002
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Articles in PresS, published online ahead of print February 15, 2002
J Appl Physiol, 10.1152/jap.00020.2002
Submitted on January 11, 2002
Accepted on February 15, 2002

Influence of endurance exercise training status and gender on postexercise hypotension

Annette N Senitko1, Nisha Charkoudian1, and John R Halliwill1*

1 Department of Anesthesiology and General Clinical Research Center, Mayo Clinic and Foundation, Rochester, MN, USA

* To whom correspondence should be addressed. E-mail: halliwill.john{at}mayo.edu.

In sedentary individuals, postexercise hypotension following a single bout of aerobic exercise is due to a peripheral vasodilation. Endurance exercise training has the potential to modify this response and perhaps reduce the degree of postexercise hypotension. We tested the hypothesis that endurance exercise-trained men and women would have blunted postexercise hypotension compared to sedentary subjects, but the mechanism of hypotension would be similar (i.e., vasodilation). We studied 16 endurance-trained and 16 sedentary men and women. Arterial pressure, cardiac output, and total peripheral resistance were determined before and after a single 60-min bout of exercise at 60% VO2peak. All groups exhibited a similar degree of postexercise hypotension (~4-5 mmHg, P<0.05 vs pre-exercise). In sedentary men and women, hypotension was the result of vasodilation ({Delta} resistance: -8.9±2.2%). In endurance-trained women, hypotension was also the result of vasodilation (-8.1±4.1%). However, in endurance-trained men, hypotension was the result of a reduced cardiac output (-5.2±2.4%, P<0.05 vs all others) and vasodilation was absent (-0.7±3.3%, P<0.05 vs all others). Thus, we conclude the magnitude of postexercise hypotension is similar in sedentary and endurance-trained men and women, but that endurance-trained men and women achieve this fall in pressure via different mechanisms.




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