title: Effects of exercise on vasodilatory capacity in endurance- and resistance-trained men.
abstract: To determine vasodilatory responsiveness we measured forearm blood flow (FBF) following reactive hyperemia (RH), prior to and following a bout of maximal aerobic exercise in endurance- (n=14) and resistance-trained men (n=10). Both groups were similar in height, body mass, and percentage body fat. Using strain-gauge plethysmography, resting FBF was higher in the resistance-trained group [4.82 (0.84) vs 3.33 (1.17) ml min(-1) 100 ml(-1) of tissue; P<0.05]. However, the resistance-trained group had a 17%-29% lower pre-exercise FBF response to RH for the first 45 s (P<0.05). Following the maximal exercise bout there were no group differences in FBF. Post-exercise FBF was higher compared to pre-exercise values in both the endurance- (P<0.001) and resistance- (P<0.01) trained groups. Endurance-trained men appear to have a greater peak vasodilatory capacity compared to resistance-trained men, and acute maximal exercise increased the vasodilatory capacity in both groups. Acute exercise also equalized the peak vasodilatory response between the endurance- and resistance-trained groups, suggesting the potential for flow-mediated vasodilatation was similar for both groups.
authors.affiliation: Exercise Science Department, Syracuse University, Rm. 201, 820 Comstock Avenue, Syracuse, NY 13244, USA. tbaynard@syr.edu
authors.forename: Tracy
authors.initials: T
authors.lastname: Baynard
authors.forename: Wayne C
authors.initials: WC
authors.lastname: Miller
authors.forename: Bo
authors.initials: B
authors.lastname: Fernhall
mesh_terms: D000293:Adolescent; D000328:Adult; D001823:Body Composition; D015444:Exercise; D005542:Forearm / Q000098:blood supply* / Q000503:physiopathology*; D006801:Humans; D006940:Hyperemia / Q000209:etiology / Q000503:physiopathology*; D008297:Male; D010101:Oxygen Consumption; D010806:Physical Education and Training / Q000379:methods*; D010807:Physical Endurance; D012039:Regional Blood Flow; D014664:Vasodilation