Influence of exercise intensity and plasma volume on active cutaneous vasodilation in humans

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Deutscher übersetzter Titel:Einfluss von Belastungsintensitaet und Plasmavolumen auf die aktive Vasodilatation der Hautgefaesse bei Menschen
Autor:Mack, Gary W.; Nose, Hiroshi; Takamata, Akira; Morimoto, Taketoshi; Okuno, Tadashi
Erschienen in:Medicine and science in sports and exercise
Veröffentlicht:26 (1994), 2, S. 209-216, Lit.
Format: Literatur (SPOLIT)
Publikationstyp: Zeitschriftenartikel
Medienart: Gedruckte Ressource
Sprache:Englisch
ISSN:0195-9131, 1530-0315
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Erfassungsnummer:PU199408071650
Quelle:BISp

Abstract

The influence of dynamic exercise on active cutaneous vasodilation was evaluated in eight male subjects. We measured the increase in internal body temperature (esophageal temperature, Tes) required to elicit active cutaneous vasodilation and the slope of the linear relationship between increases in forearm skin vascular conductance and Tes during indirect heating (legs immersed in 44 deg C water for 20 min), 30 min of light exercise (75 +/- 5 W = 30% maximal oxygen uptake, VO2max), and 20 min of moderate exercise (149 +/- 7 W = 60% VO2max). Studies were conducted in the supine position at 30 deg C (RH < 30%) and mean skin temperature averaged 35.09 +/- 0.12 deg C. Results show that the influence of exercise on the threshold for active cutaneous vasodilation is dependent on an interaction between exercise intensity and the size of the intravascular compartment. This conclusion is consistent with the hypothesis that blood volume expansion is an important adaptation of exercise training and contributes to improved thermoregulatory control during exercise in the heat. Verf.-Referat (gekuerzt)