| Vitamin E supplementation does not alter physiological performance at fixed blood lactate concentrations in trained runners. | |
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MedLine Citation:
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PMID: 22327088 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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AIM: The aim of the study was to determine the direction of change in performance variables at fixed blood lactate concentrations following vitamin E (VE) supplementation. METHODS: In a paired-matched design twelve (male: N.=8; female: N.=4) trained runners were allocated to a VE (N.=6; 268 mg·d-1) or placebo (N.=6; glucose: 30 mg·d-1) group for 35 days. Participants completed a discontinuous incremental exercise test, pre and post supplementation, to determine peak oxygen uptake (VO2peak) running velocity and percentage of peak oxygen uptake (%(VO2peak) at the lactate threshold (TLAC) and the onset of blood lactate accumulation (OBLA). Participants maintained a standardised training regime throughout the supplementation period. RESULTS: VE supplementation failed to significantly enhance velocity at TLAC (P=0.91) and OBLA (P=0.22) compared to a placebo treatment. Analogously, VE did not significantly enhance %(VO2peak) at TLAC (P=0.85) and OBLA (P=0.71) compared to a placebo treatment. Whilst VE supplementation did not enhance performance it did not impair performance compared to a placebo. Training significantly enhanced velocity at TLAC (P=0.00) and OBLA (P=0.05). No training-induced improvements in %VO2peak at TLAC (P=0.06) and OBLA (P=0.40) were observed. CONCLUSION: Daily VE supplementation for 35 days does not enhance or impair physiological performance at fixed blood lactate concentrations. Long-term VE supplementation for the purposes of performance enhancement is not recommended. |
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Authors:
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J N Cobley; K Marrin |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Journal of sports medicine and physical fitness Volume: 52 ISSN: 0022-4707 ISO Abbreviation: J Sports Med Phys Fitness Publication Date: 2012 Feb |
Date Detail:
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Created Date: 2012-02-13 Completed Date: - 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: 63-70 Citation Subset: IM |
Affiliation:
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Sport and Exercise Research Group, Department of Sport and Physical Activity, Edge Hill University Ormskirk, Lancashire, UK - marrink@edgehill.ac.uk. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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