Sweating distribution and active sweat glands on the scalp of young males in hot-dry and hot-humid environments

Jung D 1 , Kim YB 2 , Lee JB 3 , Muhamed AMC 4 , Lee JY 5

Affiliations 

  • 1 COM:FORT Laboratory, College of Human Ecology, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, South Korea
  • 2 Research Institute of Human Ecology, College of Human Ecology, Seoul National University, Seoul, 08826, South Korea
  • 3 Department of Physiology, College of Medicine, Soonchunhyang University, Cheonan, 31151, South Korea
  • 4 Lifestyle Science Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Kepala Batas, Penang, Malaysia
  • 5 COM:FORT Laboratory, College of Human Ecology, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, South Korea. leex3140@snu.ac.kr
Eur J Appl Physiol, 2018 Dec;118(12):2655-2667.
PMID: 30209544 DOI: 10.1007/s00421-018-3988-7

Abstract

PURPOSE: We investigated the effects of humidity on regional sweating secretion and active sweat gland density on the scalp during passive heating in hot environments.

METHODS: Eight male subjects shaved their heads prior to expose to dry (30%RH; H30%) and humid (85%RH; H85%) conditions at an air temperature of 32 °C. Total sweat rate, local sweat rates (frontal, vertex, temporal, and occipital regions), active sweat glands on the scalp (2 frontal, 2 parietal, 2 temporal, 1 occipital, and 1 vertex), and rectal and skin temperatures were measured during leg immersion in 42 °C water for 60 min.

RESULTS: (1) Total sweat rates were greater for H30% (179.4 ± 35.6 g h-1) than for H85% (148.1 ± 27.2 g h-1) (P 

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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