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

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posted on 18.02.2019 by Nicola Gerrett, Tatsuro Amano, George Havenith, Yoshimitsu Inoue, N. Kondo
PURPOSE: Changes in mean skin temperature (Tsk) 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 Tsk. METHODS: The influence of local Tsk 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 (Tes), forearm Tsk, 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 [Tes and body temperature (Tb)] 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 Tsk may not affect the sweat gland maximum ion reabsorption rates but when the local Tsk increases by > 6 °C, ion reabsorption rates also increase.

Funding

This study was supported by a Grant-in-Aid for Scientific Research (16H04851 and 17H0253) from the Japan Society for the Promotion of Science from the Ministry of Education, Culture, Sports, Science, and Technology of Japan.

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Published in

European Journal of Applied Physiology

Volume

119

Citation

GERRETT, N. ... et al., 2019. The influence of local skin temperature on the sweat glands maximum ion reabsorption rate. European Journal of Applied Physiology, 119: 685.

Publisher

© Springer

Version

AM (Accepted Manuscript)

Publisher statement

This is a post-peer-review, pre-copyedit version of an article published in European Journal of Applied Physiology. The final authenticated version is available online at: https://doi.org/10.1007/s00421-018-04059-5

Acceptance date

18/12/2018

Publication date

2019-02-07

Copyright date

2019

eISSN

1439-6327

Language

en

Location

Germany

Article number

685

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