| Does net energy cost of swimming affect time to exhaustion at the individual's maximal oxygen consumption velocity? | |
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MedLine Citation:
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PMID: 16998440 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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AIM: The purpose of the present study was to examine the relationship between time limit at the minimum velocity that elicits the individual's maximal oxygen consumption (TLim-v VO2max) and three swimming economy related parameters: the net energy cost corresponding to v VO2max (Cv VO2max), the slope of the regression line obtained from the energy expenditure (E) and corresponding velocities during an incremental test (C(slope)) and the ratio between the mean E value and the velocity mean value of the incremental test (C(inc)). Complementarily, we analysed the influence of Cv VO2max, C(slope) and C(inc) on TLim-v VO2max by swimming level. METHODS: Thirty swimmers divided into 10 low-level (LLS) (4 male and 6 female) and 20 highly trained swimmers (HTS) (10 of each gender) performed an incremental test for v VO2max assessment and an all-out TLim-v VO2max test. RESULTS: TLim-v VO2max, v VO2max, Cv fVO2max, C(slope) and C(inc) averaged, respectively, 313.8+/-63 s, 1.16+/-0.1 m x s(-1), 13.2+/-1.9 J x kg(-1) x m(-1), 28+/-3.2 J x kg(-1) x m(-1) and 10.9+/-1.8 J x kg(-1) x m(-1) in the LLS and 237.3+/-54.6 s, 1.4+/-0.1 m x s(-1), 15.6+/-2.2 J x kg(-1) x m(-1), 36.8+/-4.5 J x kg(-1) x m(-1) and 13+/-2.3 J x kg(-1) x m(-1) in the HTS. TLim-v VO2max was inversely related to C(slope) (r = -0.77, P < 0.001), and to v VO2max (r = -0.35, P = 0.05), although no relationships with the Cv VO2max and the C(inc) were observed. CONCLUSIONS: The findings of this study confirmed exercise economy as an important factor for swimming performance. The data demonstrated that the swimmers with higher and v VO2max performed shorter time in TLim-v VO2max efforts. |
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Authors:
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R J Fernandes; V L Billat; A C Cruz; P J Colaço; C S Cardoso; J P Vilas-Boas |
Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: The Journal of sports medicine and physical fitness Volume: 46 ISSN: 0022-4707 ISO Abbreviation: J Sports Med Phys Fitness Publication Date: 2006 Sep |
Date Detail:
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Created Date: 2006-09-25 Completed Date: 2007-05-25 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0376337 Medline TA: J Sports Med Phys Fitness Country: Italy |
Other Details:
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Languages: eng Pagination: 373-80 Citation Subset: IM |
Affiliation:
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Faculty of Sport Sciences and Physical Education, Swimming Department, University of Porto, Porto, Portugal. ricfer@fcdef.up.pt |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Energy Metabolism / physiology* Female Heart Rate / physiology Humans Male Muscle Fatigue / physiology* Oxygen Consumption / physiology* Physical Education and Training Physical Endurance / physiology* Regression Analysis Swimming* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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