Document Detail


Comparison of on-ice and off-ice graded exercise testing in collegiate hockey players.
MedLine Citation:
PMID:  20130664     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The purpose of this study was to compare lactate thresholds (LT) and maximal aerobic capacities (VO(2 max) during sport-specific skating (on ice) and cycle ergometry (off ice) in collegiate hockey players. We hypothesized that VO(2 max) and LT would be higher on ice. We also sought to determine if on-ice and off-ice VO(2 max) values were correlated. Twelve collegiate hockey players performed both graded exercise protocols in randomized order to fatigue. Both protocols included 80 s of work during each stage, followed by 40 s of rest to allow for blood lactate sampling. VO(2 max) was significantly higher on ice (46.9 +/- 1.0 mL*kg(-1)*min(-1)) than off ice (43.6 +/- 0.9 mL*kg(-1)*min(-1); p < 0.05). Maximal heart rate (HR(max)) was also higher on ice (192.2 +/- 1.8 beats*min(-1)) than off ice (186.0 +/- 1.5 beats*min(-1); p < 0.01). LT was drastically higher on ice than off ice as a percentage of VO(2 max) (85.9% +/- 1.9% vs. 69.7% +/- 1.3%; p < 0.01) and HR(max) (90.1% +/- 1.3% vs. 79.4% +/- 1.6%; p < 0.01). Finally, no correlation existed between VO(2 max) values off ice and on ice (r = -0.002; p = 0.99). Our results indicate that off-ice VO(2 max) and LT are not adequate predictors of on-ice VO(2 max) and LT in collegiate hockey players. These findings challenge the use of cycle ergometry to assess aerobic capacity at events such as the National Hockey League Entry Draft combine. We suggest that hockey players be tested in a sport-specific manner, regardless of whether those tests are performed on ice or off ice.
Authors:
John J Durocher; Angela J Guisfredi; Darin T Leetun; Jason R Carter
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Publication Detail:
Type:  Comparative Study; Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Applied physiology, nutrition, and metabolism = Physiologie appliqu?e, nutrition et m?tabolisme     Volume:  35     ISSN:  1715-5312     ISO Abbreviation:  Appl Physiol Nutr Metab     Publication Date:  2010 Feb 
Date Detail:
Created Date:  2010-02-04     Completed Date:  2010-04-20     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101264333     Medline TA:  Appl Physiol Nutr Metab     Country:  Canada    
Other Details:
Languages:  eng     Pagination:  35-9     Citation Subset:  IM    
Affiliation:
Department of Exercise Science, Health, and Physical Education, Michigan Technological University, Houghton, MI 49931, USA. jdurocher@francis.edu
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MeSH Terms
Descriptor/Qualifier:
Adult
Anaerobic Threshold / physiology*
Bicycling / physiology,  statistics & numerical data
Exercise Test / methods*,  statistics & numerical data*
Hockey / physiology*,  statistics & numerical data
Humans
Lactic Acid / blood*
Male
Muscle Fatigue / physiology
Oxygen Consumption / physiology*
Physical Exertion / physiology
Reproducibility of Results
Young Adult
Chemical
Reg. No./Substance:
50-21-5/Lactic Acid

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


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