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07.02.2018 | Original Article | Ausgabe 4/2018

European Journal of Applied Physiology 4/2018

Localised cutaneous microvascular adaptation to exercise training in humans

Zeitschrift:
European Journal of Applied Physiology > Ausgabe 4/2018
Autoren:
Ceri L. Atkinson, Howard H. Carter, Dick H. J. Thijssen, Gurpreet K. Birk, N. Timothy Cable, David A. Low, Floortje Kerstens, Iris Meeuwis, Ellen A. Dawson, Daniel J. Green
Wichtige Hinweise
Communicated by Narihiko Kondo.

Abstract

Purpose

Exercise training induces adaptation in conduit and resistance arteries in humans, partly as a consequence of repeated elevation in blood flow and shear stress. The stimuli associated with intrinsic cutaneous microvascular adaptation to exercise training have been less comprehensively studied.

Methods

We studied 14 subjects who completed 8-weeks cycle ergometer training, with partial cuff inflation on one forearm to unilaterally attenuate cutaneous blood flow responses during each exercise-training bout. Before and after training, bilateral forearm skin microvascular dilation was determined using cutaneous vascular conductance (CVC: skin flux/blood pressure) responses to gradual localised heater disk stimulation performed at rest (33, 40, 42 and 44 °C).

Results

Cycle exercise induced significant increases in forearm cutaneous flux and temperature, which were attenuated in the cuffed arm (2-way ANOVA interaction-effect; P < 0.01). We found that forearm CVC at 42 and 44 °C was significantly lower in the uncuffed arm following 8-weeks of cycle training (P < 0.01), whereas no changes were apparent in the contralateral cuffed arm (P = 0.77, interaction-effect P = 0.01).

Conclusions

Lower limb exercise training in healthy young men leads to lower CVC-responses to a local heating stimulus, an adaptation mediated, at least partly, by a mechanism related to episodic increases in skin blood flow and/or skin temperature.

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