| The effect of sodium bicarbonate ingestion on high-intensity intermittent running and subsequent performance. | |
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MedLine Citation:
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PMID: 20555273 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The purpose of this study was to determine the effects of sodium bicarbonate (NaHCO3) ingestion on intermittent running and subsequent performance. Eight healthy men volunteered to take part in the study. One hour after the ingestion of either NaHCO(3) or placebo (sodium chloride; NaCl) participants undertook 20 x 24-second runs on a motorized treadmill at the velocity eliciting maximal oxygen uptake (100% v-VO(2)max). After sprint 20 participants performed a run to volitional exhaustion at 120% v-VO(2)max. Capillary blood samples for blood pH, bicarbonate ([HCO(3)]), and lactate ([Bla]) concentration were taken pre and postingestion, every fifth sprint and after the performance run. After ingestion of NaHCO(3), blood [HCO(3)] increased from resting values (p < 0.05), and the increase in pH approached significance. Blood [HCO(3)(-)] continually decreased throughout intermittent exercise (p < 0.05) and decreased further after performance in both trials (p < 0.05). [Bla] was similar in both trials throughout intermittent exercise but was greater at exhaustion for NaHCO(3) (main effect for trial; p < 0.05). There was no significant difference in performance of the group between trials (78 +/- 22 and 75 +/- 22 seconds for NaHCO(3) and NaCl, respectively). The intercept of the relationships between [Bla] and [HCO(3)(-)] and between [Bla] and pH was greater during NaHCO(3) (p < 0.05), whereas the relationship between pH and [HCO(3)(-)] was unchanged (p > 0.05). The results of this study suggest that the ingestion of NaHCO(3) before intermittent type exercise was sufficient to induce metabolic alkalosis but did not significantly affect performance. However, because significant individual variations in performance were observed, an individual approach to bicarbonate ingestion is recommended based on the intensity and duration of the required performance. |
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Authors:
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Michael J Price; Christopher Simons |
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Publication Detail:
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Type: Journal Article; Randomized Controlled Trial |
Journal Detail:
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Title: Journal of strength and conditioning research / National Strength & Conditioning Association Volume: 24 ISSN: 1533-4287 ISO Abbreviation: J Strength Cond Res Publication Date: 2010 Jul |
Date Detail:
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Created Date: 2010-07-05 Completed Date: 2010-10-25 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9415084 Medline TA: J Strength Cond Res Country: United States |
Other Details:
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Languages: eng Pagination: 1834-42 Citation Subset: IM |
Affiliation:
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Department of Physiology and Sports Science, Faculty of Health and Life Sciences, Coventry University, Coventry, United Kingdom. mike.price@coventry.ac |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Alkalosis
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chemically induced Athletic Performance / physiology* Bicarbonates / blood Heart Rate / drug effects, physiology Humans Hydrogen-Ion Concentration / drug effects Lactic Acid / blood Male Oxygen Consumption / drug effects, physiology Running / physiology* Sodium Bicarbonate / administration & dosage* Young Adult |
| Chemical | |
Reg. No./Substance:
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0/Bicarbonates; 144-55-8/Sodium Bicarbonate; 50-21-5/Lactic Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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