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European Journal of Applied Physiology

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01-03-2019 | Original Article

The influence of local skin temperature on the sweat glands maximum ion reabsorption rate

Authors: N. Gerrett, T. Amano, G. Havenith, Y. Inoue, Narihiko Kondo

Published in: European Journal of Applied Physiology | Issue 3/2019

Abstract

Purpose

Changes in mean skin temperature (T_sk) have been shown to modify the maximum rate of sweat ion reabsorption. This study aims to extend this knowledge by investigating if modifications could also be caused by local T_sk.

Methods

The influence of local T_sk on the sweat gland maximum ion reabsorption rates was investigated in ten healthy volunteers (three female and seven male; 20.8 ± 1.2 years, 60.4 ± 7.7 kg, 169.4 ± 10.4 cm) during passive heating (water-perfused suit and lower leg water immersion). In two separate trials, in a randomized order, one forearm was always manipulated to 33 °C (Neutral), whilst the other was manipulated to either 30 °C (Cool) or 36 °C (Warm) using water-perfused patches. Oesophageal temperature (T_es), forearm T_sk, sweat rate (SR), galvanic skin conductance (GSC) and salivary aldosterone concentrations were measured. The sweat gland maximum ion reabsorption rates were identified using the ∆SR threshold for an increasing ∆GSC.

Results

Thermal [T_es and body temperature (T_b)] and non-thermal responses (aldosterone) were similar across all conditions (p > 0.05). A temperature-dependent response for the sweat gland maximum ion reabsorption rates was evident between 30 °C (0.18 ± 0.10 mg/cm²/min) and 36 °C (0.28 ± 0.14 mg/cm²/min, d = 0.88, p < 0.05), but not for 33 °C (0.22 ± 0.12 mg/cm²/min), d = 0.44 and d = 0.36, p > 0.05.

Conclusion

The data indicate that small variations in local T_sk may not affect the sweat gland maximum ion reabsorption rates but when the local T_sk increases by > 6 °C, ion reabsorption rates also increase.

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Title: The influence of local skin temperature on the sweat glands maximum ion reabsorption rate
Authors: N. Gerrett
T. Amano
G. Havenith
Y. Inoue
Narihiko Kondo
Publication date: 01-03-2019
Publisher: Springer Berlin Heidelberg
Published in: European Journal of Applied Physiology / Issue 3/2019
Print ISSN: 1439-6319
Electronic ISSN: 1439-6327
DOI: https://doi.org/10.1007/s00421-018-04059-5

At a glance: The STEP trials

Springer Medicine

The influence of local skin temperature on the sweat glands maximum ion reabsorption rate

Abstract

Purpose

Methods

Results

Conclusion

At a glance: The STEP trials

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusion

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