Document Detail


Hot ambient conditions do not alter intermittent cycling sprint performance.
MedLine Citation:
PMID:  21940212     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
To investigate the effect of hot exposure on the ability to perform intermittent cycling sprints. Ten male volunteers performed 35min of intermittent cycling comprising of 8 maximal 6-s sprints interspersed by 1min of passive recovery followed by 4min of constant-load pedaling (1Wkg(-1) of body weight) on a cycle ergometer in control (24°C, 24% rH) and hot (40°C, 40% rH) environments. Peak power output did not decrease during the exercise and was not dependent on the environmental temperature (average of 767±120W in control and 767±119W in hot, NS). Skin temperatures (e.g., chest: 36.8±0.8 vs. 32.7±0.6°C), heart rate (132±13 vs. 118±13bpm) and rating of perceived exertion (13±3 vs. 11±3) were higher (all p<0.05) in hot than control environment. However, EMG activity (RMS, vastus lateralis) and neuromuscular efficiency (power/RMS ratio) were similar at the two environmental conditions. Despite higher cardiovascular and perceptual strain in the hot trial, heat exposure did not alter neither peak power output nor related muscle activation and neuromuscular efficiency in the absence of hyperthermia (average core temperature of 37.6±0.3°C in control vs. 37.7±0.4°C in hot, NS).
Authors:
Fuad Almudehki; Olivier Girard; Justin Grantham; Sebastien Racinais
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-9-20
Journal Detail:
Title:  Journal of science and medicine in sport / Sports Medicine Australia     Volume:  -     ISSN:  1878-1861     ISO Abbreviation:  -     Publication Date:  2011 Sep 
Date Detail:
Created Date:  2011-9-23     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9812598     Medline TA:  J Sci Med Sport     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.
Affiliation:
Exercise and Sports Science Department - ASPETAR, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar.
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