Document Detail

Practical neck cooling and time-trial running performance in a hot environment.
MedLine Citation:
PMID:  20694731     Owner:  NLM     Status:  MEDLINE    
The aim of this two-part experiment was to investigate the effect of cooling the neck on time-trial performance in hot conditions (~30°C; 50% RH). In Study A, nine participants completed a 75-min submaximal (~60% V(O₂(max)) pre-load phase followed by a 15-min self-paced time-trial (TT) on three occasions: one with a cooling collar (CC(90)), one without a collar (NC(90)) and one with the collar uncooled (C(90)). In Study B, eight participants completed a 15-min TT twice: once with (CC(15)) and once without (NC(15)) a cooling collar. Time-trial performance was significantly improved in Study A in CC(90) (3,030 ± 485 m) compared to C(90) (2,741 ± 537 m; P = 0.008) and NC(90) (2,884 ± 571 m; P = 0.041). Fifteen-minute TT performance was unaffected by the collar in Study B (CC(15) = 3,239 ± 267 m; NC(15) = 3,180 ± 271 m; P = 0.351). The collar had no effect on rectal temperature, heart rate or RPE. There was no effect of cooling the neck on S100β, cortisol, prolactin, adrenaline, noradrenaline or dopamine concentrations in Study A. Cooling the neck via a cooling collar can improve exercise performance in a hot environment but it appears that there may be a thermal strain threshold which must be breached to gain a performance benefit from the collar.
Christopher James Tyler; Perry Wild; Caroline Sunderland
Publication Detail:
Type:  Journal Article; Randomized Controlled Trial     Date:  2010-08-08
Journal Detail:
Title:  European journal of applied physiology     Volume:  110     ISSN:  1439-6327     ISO Abbreviation:  Eur. J. Appl. Physiol.     Publication Date:  2010 Nov 
Date Detail:
Created Date:  2010-11-05     Completed Date:  2011-02-28     Revised Date:  2011-06-24    
Medline Journal Info:
Nlm Unique ID:  100954790     Medline TA:  Eur J Appl Physiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  1063-74     Citation Subset:  IM    
School of Life Sciences, Whitelands College, Roehampton University, London, UK.
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MeSH Terms
Athletic Performance / physiology*
Body Temperature / physiology
Dopamine / blood
Epinephrine / blood
Heart Rate / physiology
Hot Temperature / adverse effects*
Hydrocortisone / blood
Hypothermia, Induced / methods*
Neck / physiology*
Nerve Growth Factors / analysis
Norepinephrine / blood
Oxygen Consumption / physiology
Prolactin / blood
Running / physiology*
S100 Proteins / analysis
Young Adult
Reg. No./Substance:
0/Nerve Growth Factors; 0/S-100 calcium-binding protein beta subunit; 0/S100 Proteins; 50-23-7/Hydrocortisone; 51-41-2/Norepinephrine; 51-43-4/Epinephrine; 9002-62-4/Prolactin

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

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