Document Detail


Sweating responses and the muscle metaboreflex under mildly hyperthermic conditions in sprinters and distance runners.
MedLine Citation:
PMID:  21659489     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
To investigate the effects of different training methods on nonthermal sweating during activation of the muscle metaboreflex, we compared sweating responses during postexercise muscle occlusion in endurance runners, sprinters, and untrained men under mild hyperthermia (ambient temperature, 35°C; relative humidity, 50%). Ten endurance runners, nine sprinters, and ten untrained men (maximal oxygen uptakes: 57.5 ± 1.5, 49.3 ± 1.5, and 36.6 ± 1.6 ml·kg(-1)·min(-1), respectively; P < 0.05) performed an isometric handgrip exercise at 40% maximal voluntary contraction for 2 min, and then a pressure of 280 mmHg was applied to the forearm to occlude blood circulation for 2 min. The Δ change in mean arterial blood pressure between the resting level and the occlusion was significantly higher in sprinters than in untrained men (32.2 ± 4.4 vs. 17.3 ± 2.6 mmHg, respectively; P < 0.05); however, no difference was observed between distance runners and untrained men. The Δ mean sweating rate (averaged value of the forehead, chest, forearm, and thigh) during the occlusion was significantly higher in distance runners than in sprinters and untrained men (0.38 ± 0.07, 0.19 ± 0.03, and 0.11 ± 0.04 mg·cm(-2)·min(-1), respectively; P < 0.05) and did not differ between sprinters and untrained men. Our results suggest that the specificity of training modalities influences the sweating response during activation of the muscle metaboreflex. In addition, these results imply that a greater activation of the muscle metaboreflex does not cause a greater sweating response in sprinters.
Authors:
Tatsuro Amano; Masashi Ichinose; Shunsaku Koga; Yoshimitsu Inoue; Takeshi Nishiyasu; Narihiko Kondo
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2011-06-09
Journal Detail:
Title:  Journal of applied physiology (Bethesda, Md. : 1985)     Volume:  111     ISSN:  1522-1601     ISO Abbreviation:  J. Appl. Physiol.     Publication Date:  2011 Aug 
Date Detail:
Created Date:  2011-08-10     Completed Date:  2011-12-01     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  8502536     Medline TA:  J Appl Physiol (1985)     Country:  United States    
Other Details:
Languages:  eng     Pagination:  524-9     Citation Subset:  IM    
Affiliation:
Laboratory for Applied Human Physiology, Graduate School of Human Development and Environment, Kobe University, 3-11 Tsurukabuto, Nada-ku, Kobe 657-8501, Japan.
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MeSH Terms
Descriptor/Qualifier:
Adult
Blood Pressure / physiology
Body Temperature / physiology
Body Temperature Regulation / physiology
Exercise / physiology
Fever / physiopathology*
Hand Strength / physiology
Heart Rate / physiology
Humans
Ischemia / physiopathology
Male
Muscle, Skeletal / metabolism*,  physiology*
Oxygen Consumption / physiology
Physical Endurance / physiology*
Physical Fitness / physiology
Reflex / physiology*
Running / physiology*
Skin Physiological Phenomena
Skin Temperature / physiology
Sweating / physiology*
Temperature

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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