The influence of a menthol and ethanol soaked garment on human temperature regulation and perception during exercise and rest in warm, humid conditions

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)99-105
JournalJournal of Thermal Biology
Volume58
DOIs
Publication statusPublished - 1 May 2016
Externally publishedYes
This study assessed whether donning a garment saturated with menthol and ethanol (M/E) can improve evaporative cooling and thermal perceptions versus water (W) or nothing (CON) during low intensity exercise and rest in warm, humid conditions often encountered in recreational/occupational settings. It was hypothesised there would be no difference in rectal (Tre) and skin (Tsk) temperature, infra-red thermal imagery of the chest/back, thermal comfort (TC) and rating of perceived exertion (RPE) between M/E, W and CON, but participants would feel cooler in M/E versus W or CON. Methods Six volunteers (mean [SD] 22 [4] years, 72.4 [7.4] kg and 173.6 [3.7] cm) completed (separate days) three, 60-min tests in 30 °C, 70%rh, in a balanced order. After 15-min of seated rest participants donned a dry (CON) or 80 mL soaked (M/E, W) long sleeve shirt appropriate to their intervention. They then undertook 30-min of low intensity stepping at a rate of 12 steps/min on a 22.5 cm box, followed by 15-min of seated rest. Measurements included heart rate (HR), Tre, Tsk (chest/back/forearm), thermal imaging (back/chest), thermal sensation (TS), TC and RPE. Data were reported every fifth minute as they changed from baseline and the area under the curves were compared by condition using one-way repeated measures ANOVA, with an alpha level of 0.05. Results Tre differed by condition, with the largest heat storage response observed in M/E (p<0.05). Skin temperature at the chest/back/forearm, and thermal imaging of the chest all differed by condition, with the greatest rate of heat loss observed in W and M/E respectively (p<0.01). Thermal sensation differed by condition, with the coolest sensations observed in M/E (p<0.001). No other differences were observed. Conclusions Both M/E and W enhanced evaporative cooling compared CON, but M/E causes cooler sensations and a heat storage response, both of which are likely mediated by menthol.

    Research areas

  • Menthol, ethanol, human, thermoregulation, thermal sensation, thermal comfort

Documents

  • MANUSCRIPT-Gillis et al -Ethanol menthol

    Rights statement: © Elsevier 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/

    Accepted author manuscript, 1.07 MB, PDF document

External organisations

  • Northumbria University
  • Salem State University
  • Human Performance Research and Development, Canadian Forces Morale and Welfare Services, Ottawa, Ontario, Canada
  • University of Portsmouth

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