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Sweat gland response to exercise in the heat among pre-, mid-, and late-pubertal boys.
Med Sci Sports Exerc. 1992 Mar; 24(3):313-9.MS

Abstract

Sweating rate (SR) of boys is lower than that of men. To assess the association between the response of individual sweat glands and physical growth and maturation, three groups of circumpubertal boys cycled at 50% VO2max in a climatic chamber (42 degrees C, 20% relative humidity). Based on Tanner staging (pubic hair), 16 were classified as prepubertal (PP, Tanner 1), 15 as midpubertal (MP, Tanner 2-4), and five as late-pubertal (LP, Tanner 5). Population density (PD) of the heat-activated sweat glands, the mean area of sweat drops (DA), and the proportion of skin covered by sweat (%A) were measured by skin photography and computer-assisted imaging analysis. Other measurements included rectal and skin temperatures (Tre, Tsk, respectively), heart rate (HR), and total body SR. The rise in HR, Tre and Tsk did not differ among groups. Whole body SR was significantly higher in the LP group compared with PP (PP = 4.95 +/- 0.23, MP = 5.79 +/- 0.20, LP = 6.70 +/- 0.42 ml.min-1.m-2) (mean +/- SEM). PD was significantly higher in the PP group (PP = 128 +/- 8, MP = 97 +/- 9, LP = 74 +/- 9 glands.cm-2), while DA was higher in the LP group (PP = 5.47 +/- 0.59, MP = 6.92 +/- 0.47, LP = 12.83 +/- 1.41 microns2.10(4)). %A did not differ among groups. The calculated SR per gland was higher among the LP groups compared with the less mature ones (PP = 4.6 +/- 0.3, MP = 7.2 +/- 0.8, LP = 9.6 +/- 1.0 nl.min-1).(

ABSTRACT

TRUNCATED AT 250 WORDS)

Authors+Show Affiliations

Children's Exercise and Nutrition Centre, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

1549025

Citation

Falk, B, et al. "Sweat Gland Response to Exercise in the Heat Among Pre-, Mid-, and Late-pubertal Boys." Medicine and Science in Sports and Exercise, vol. 24, no. 3, 1992, pp. 313-9.
Falk B, Bar-Or O, Calvert R, et al. Sweat gland response to exercise in the heat among pre-, mid-, and late-pubertal boys. Med Sci Sports Exerc. 1992;24(3):313-9.
Falk, B., Bar-Or, O., Calvert, R., & MacDougall, J. D. (1992). Sweat gland response to exercise in the heat among pre-, mid-, and late-pubertal boys. Medicine and Science in Sports and Exercise, 24(3), 313-9.
Falk B, et al. Sweat Gland Response to Exercise in the Heat Among Pre-, Mid-, and Late-pubertal Boys. Med Sci Sports Exerc. 1992;24(3):313-9. PubMed PMID: 1549025.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Sweat gland response to exercise in the heat among pre-, mid-, and late-pubertal boys. AU - Falk,B, AU - Bar-Or,O, AU - Calvert,R, AU - MacDougall,J D, PY - 1992/3/1/pubmed PY - 1992/3/1/medline PY - 1992/3/1/entrez SP - 313 EP - 9 JF - Medicine and science in sports and exercise JO - Med Sci Sports Exerc VL - 24 IS - 3 N2 - Sweating rate (SR) of boys is lower than that of men. To assess the association between the response of individual sweat glands and physical growth and maturation, three groups of circumpubertal boys cycled at 50% VO2max in a climatic chamber (42 degrees C, 20% relative humidity). Based on Tanner staging (pubic hair), 16 were classified as prepubertal (PP, Tanner 1), 15 as midpubertal (MP, Tanner 2-4), and five as late-pubertal (LP, Tanner 5). Population density (PD) of the heat-activated sweat glands, the mean area of sweat drops (DA), and the proportion of skin covered by sweat (%A) were measured by skin photography and computer-assisted imaging analysis. Other measurements included rectal and skin temperatures (Tre, Tsk, respectively), heart rate (HR), and total body SR. The rise in HR, Tre and Tsk did not differ among groups. Whole body SR was significantly higher in the LP group compared with PP (PP = 4.95 +/- 0.23, MP = 5.79 +/- 0.20, LP = 6.70 +/- 0.42 ml.min-1.m-2) (mean +/- SEM). PD was significantly higher in the PP group (PP = 128 +/- 8, MP = 97 +/- 9, LP = 74 +/- 9 glands.cm-2), while DA was higher in the LP group (PP = 5.47 +/- 0.59, MP = 6.92 +/- 0.47, LP = 12.83 +/- 1.41 microns2.10(4)). %A did not differ among groups. The calculated SR per gland was higher among the LP groups compared with the less mature ones (PP = 4.6 +/- 0.3, MP = 7.2 +/- 0.8, LP = 9.6 +/- 1.0 nl.min-1).(ABSTRACT TRUNCATED AT 250 WORDS) SN - 0195-9131 UR - https://www.unboundmedicine.com/medline/citation/1549025/Sweat_gland_response_to_exercise_in_the_heat_among_pre__mid__and_late_pubertal_boys_ L2 - https://Insights.ovid.com/pubmed?pmid=1549025 DB - PRIME DP - Unbound Medicine ER -