| Determinants of repeated-sprint ability in females matched for single-sprint performance. | |
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MedLine Citation:
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PMID: 16612646 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study investigated the relationship between VO2max and repeated-sprint ability (RSA), while controlling for the effects of initial sprint performance on sprint decrement. This was achieved via two methods: (1) matching females of low and moderate aerobic fitness (VO2max: 36.4 +/- 4.7 vs 49.6 +/- 5.5 ml kg(-1) min(-1) ; p < 0.05) for initial sprint performance and then comparing RSA, and (2) semi-partial correlations to adjust for the influence of initial sprint performance on RSA. Tests consisted of a RSA cycle test (5 x 6-s max sprints every 30 s) and a VO2max test. Muscle biopsies were taken before and after the RSA test. There was no significant difference between groups for work (W1, 3.44 +/- 0.57 vs 3.58 +/- 0.49 kJ; p = 0.59) or power (P1, 788.1 +/- 99.2 vs 835.2 +/- 127.2 W; p = 0.66) on the first sprint, or for total work (W(tot), 15.2 +/- 2.2 vs 16.6 +/- 2.2 kJ; p = 0.25). However, the moderate VO2max group recorded a smaller work decrement across the five sprints (W(dec), 11.1 +/- 2.5 vs 7.6 +/- 3.4%; p = 0.045). There were no significant differences between the two groups for muscle buffer capacity, muscle lactate or pH at any time point. When a semi-partial correlation was performed, to control for the contribution of W1 to W(dec), the correlation between VO2max and W(dec) increased from r = -0.41 (p > 0.05) to r = -0.50 (p < 0.05). These results indicate that VO2max does contribute to performance during repeated-sprint efforts. However, the small variance in W(dec) explained by VO2max suggests that other factors also play a role. |
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Authors:
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David Bishop; Johann Edge |
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Publication Detail:
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Type: Journal Article Date: 2006-04-13 |
Journal Detail:
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Title: European journal of applied physiology Volume: 97 ISSN: 1439-6319 ISO Abbreviation: Eur. J. Appl. Physiol. Publication Date: 2006 Jul |
Date Detail:
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Created Date: 2006-06-28 Completed Date: 2006-09-22 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100954790 Medline TA: Eur J Appl Physiol Country: Germany |
Other Details:
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Languages: eng Pagination: 373-9 Citation Subset: IM |
Affiliation:
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Team Sport Research Group, School of Human Movement and Exercise Science, The University of Western Australia, Crawley, WA, 6009, Australia. dbishop@cyllene.uwa.edu.au |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Anaerobic Threshold Exercise Test Female Humans Hydrogen-Ion Concentration Lactic Acid / metabolism Muscle, Skeletal / metabolism* Oxygen / metabolism* Oxygen Consumption* Physical Fitness / physiology* Pulmonary Gas Exchange Sports / physiology* Time Factors |
| Chemical | |
Reg. No./Substance:
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50-21-5/Lactic Acid; 7782-44-7/Oxygen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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