| Cold exposure during military operations: effects on anaerobic performance. | |
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MedLine Citation:
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PMID: 1917733 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study examined the effects of military field operations (MFO) under different environmental conditions on anaerobic performance. US Marines were tested in the field under the following conditions: 1) noncold environment (NC; n = 30, 10-32 degrees C) and 2) cold environment (CO; n = 32, -2 to -22 degrees C). Subjects performed 30-s Wingate tests (WIN) pre- and immediately post-MFO to assess anaerobic performance. The MFO consisted of approximately 4.5 days of combat training maneuvers while carrying field equipment (packs and weapon, approximately 25 kg). WIN measures obtained were absolute and relative mean power (MP), 5-s peak power (PP), and fatigue index (% decline). Significant main effects (P less than 0.01) were observed for time (pre-post MFO). Reductions occurred in absolute MP [651.8 +/- 30.3 to 616.4 +/- 28.5 (SE) W] and PP (897.8 +/- 41.6 to 857.0 +/- 39.1 W); however, no effect on fatigue index was seen. Significant interaction effects (P less than 0.05) were observed in relative measures. Reductions (pre-post) in MP (NC = 8.64 +/- 0.16 to 8.37 +/- 0.14 W/kg; CO = 8.91 +/- 0.26 to 8.04 +/- 0.15 W/kg) and PP (NC = 11.80 +/- 0.24 to 11.61 +/- 0.33 W/kg; CO = 12.23 +/- 0.35 to 11.20 +/- 0.19 W/kg) were greater under CO than NC conditions. These changes were found despite significant (P less than 0.05) but comparable pre-post weight reductions in both CO and NC conditions.(ABSTRACT TRUNCATED AT 250 WORDS) |
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Authors:
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A C Hackney; J M Shaw; J A Hodgdon; J T Coyne; D L Kelleher |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Journal of applied physiology (Bethesda, Md. : 1985) Volume: 71 ISSN: 8750-7587 ISO Abbreviation: J. Appl. Physiol. Publication Date: 1991 Jul |
Date Detail:
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Created Date: 1991-11-13 Completed Date: 1991-11-13 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 8502536 Medline TA: J Appl Physiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 125-30 Citation Subset: IM |
Affiliation:
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Department of Physical Education, Exercise, and Sport Science, University of North Carolina, Chapel Hill 27599. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Anaerobiosis Aspartate Aminotransferases / blood Cold Temperature* Creatine Kinase / blood Exercise* Exercise Test Hematocrit Humans L-Lactate Dehydrogenase / blood Male |
| Grant Support | |
ID/Acronym/Agency:
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2 S07 RR07072/RR/NCRR NIH HHS |
| Chemical | |
Reg. No./Substance:
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EC 1.1.1.27/L-Lactate Dehydrogenase; EC 2.6.1.1/Aspartate Aminotransferases; EC 2.7.3.2/Creatine Kinase |
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