| Short-term exercise-heat acclimation enhances skin vasodilation but not hyperthermic hyperpnea in humans exercising in a hot environment. | |
| | |
MedLine Citation:
|
PMID: 21547423 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
We tested the hypothesis that short-term exercise-heat acclimation (EHA) attenuates hyperthermia-induced hyperventilation in humans exercising in a hot environment. Twenty-one male subjects were divided into the two groups: control (C, n = 11) and EHA (n = 10). Subjects in C performed exercise-heat tests [cycle exercise for ~75 min at 58% [Formula: see text] (37°C, 50% relative humidity)] before and after a 6-day interval with no training, while subjects in EHA performed the tests before and after exercise training in a hot environment (37°C). The training entailed four 20-min bouts of exercise at 50% [Formula: see text] separated by 10 min of rest daily for 6 days. In C, comparison of the variables recorded before and after the no-training period revealed no changes. In EHA, the training increased resting plasma volume, while it reduced esophageal temperature (T (es)), heart rate at rest and during exercise, and arterial blood pressure and oxygen uptake ([Formula: see text]) during exercise. The training lowered the T (es) threshold for increasing forearm vascular conductance (FVC), while it increased the slope relating FVC to T (es) and the peak FVC during exercise. It also lowered minute ventilation ([Formula: see text]) during exercise, but this effect disappeared after removing the influence of [Formula: see text] on [Formula: see text]. The training did not change the slope relating ventilatory variables to T (es). We conclude that short-term EHA lowers ventilation largely by reducing metabolism, but it does not affect the sensitivity of hyperthermia-induced hyperventilation during submaximal, moderate-intensity exercise in humans. |
| | |
Authors:
|
Naoto Fujii; Yasushi Honda; Takeshi Ogawa; Bun Tsuji; Narihiko Kondo; Shunsaku Koga; Takeshi Nishiyasu |
Related Documents
:
|
3551513 - The anaerobic threshold: definition, physiological significance and identification. 12960513 - Influence of acute alcohol load on metabolism of skeletal muscles--expired gas analysis... 11757283 - Carbon emissions and sequestration potential of central african ecosystems. |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2011-5-6 |
Journal Detail:
|
Title: European journal of applied physiology Volume: - ISSN: 1439-6327 ISO Abbreviation: - Publication Date: 2011 May |
Date Detail:
|
Created Date: 2011-5-6 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 100954790 Medline TA: Eur J Appl Physiol Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
|
Institute of Health and Sports Science, University of Tsukuba, Tsukuba, Ibaraki, 305-8574, Japan. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Does Prophylactic Biologic Mesh Placement Protect Against the Development of Incisional Hernia in Hi...
Next Document: Brain phenotype of carbonic anhydrase IX-deficient mice.