Modification of the cutaneous vascular response to exercise by local skin temperature

W. F. Taylor, J. M. Johnson, D. S. O'Leary, M. K. Park

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

This study examined how local forearm temperature (T(loc) affects the responsiveness of the cutaneous vasculature to a reflex drive for vasoconstriction. We observed responses in forearm blood flow (FBF) and arterial blood pressure to a 5-min bout of supine leg exercise of moderate intensity (125-175 W) after the forearm had been locally warmed to 36, 38, 40, or 42°C for 48 min. With exercise, FBF fell by 1.82 ± 0.23, 4.06 ± 0.58, and 3.64 ± 1.48 ml·100 ml-1·min-1 at 36, 38, and 40° C, respectively, and rose by 2.16 ± 0.57 ml·100 ml·min-1·100 mmHg-1 at 36, 38, 40, and 42°C, respectively. Second-order polynomial regression analysis indicated that the reductions in FVC were greatest near a T(loc) of 39°C and that a T(loc) of 40 or 42° C the cutaneous vasoconstrictor response to the onset of exercise is attenuated. Although elevated T(loc) can be used to increase base-line FBF levels to make cutaneous vasoconstrictor responses more obvious, the direct effects of T(loc) on this response must also be considered. We conclude that the optimum T(loc) for observing reflex cutaneous vasoconstriction is near 39°C.

Original languageEnglish (US)
Pages (from-to)1878-1884
Number of pages7
JournalJournal of Applied Physiology Respiratory Environmental and Exercise Physiology
Volume57
Issue number6
DOIs
StatePublished - 1984

ASJC Scopus subject areas

  • Physiology
  • Endocrinology

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