PMID: 8964720Mar 1, 1996Paper

Effect of hypoglycemia on thermoregulatory responses

Journal of Applied Physiology
T C PassiasI B Mekjavić

Abstract

The effects of hypoglycemia on sweating, skin blood perfusion, and shivering responses were investigated in 10 healthy male volunteers. They exercised on an underwater cycle ergometer while immersed to the neck in 28 degrees C water for 20 min at 50% of their maximal work rate. The exercise-induced elevation in esophageal temperature (T(es)) initiated the sweating response (Esw) and increased skin blood perfusion (SkBP) as measured at the forehead. In the 99-min postexercise immersion period, the values of T es relative to resting level (delta T(es)) at which Esw abated, SkBP reached preexercise values, and shivering commenced were defined as the delta T(es) thresholds for cessation of sweating, passive vasodilation, and onset of shivering, respectively. Two trials were conducted 1 wk apart. The subject was hypoglycemic in one trial and euglycemic in the other (plasma glucose was maintained at 2.8 and 5 mM, respectively) with the use of the hyperinsulinemic (insulin infusion rate = 60 mU.m-2.min-1) glucose-clamp technique. Oxygen uptake, Esw, T(es), mean skin temperature, heat flux from the skin, and SkBP were recorded at minute intervals. Although heat flux and SkBP attained significantly higher end-exercise levels during eugl...Continue Reading

Citations

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Aug 7, 2021·Life·Igor B MekjavicUrša Ciuha

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