| Handgrip contribution to lactate production and leg power during high-intensity exercise. | |
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MedLine Citation:
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PMID: 12048334 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: The purpose of this study was to examine the upper-body contribution via handgrip to power profiles and blood lactate concentrations during high-intensity cycle ergometry. METHODS: Nine trained male subjects each completed a 20-s high-intensity cycle ergometer test twice, in a random manner, using two protocols, with a handgrip (WG), and without handgrip (WOHG). Capillary (earlobe) blood samples were obtained pre- and post-exercise. Blood samples were corrected for plasma volume changes and analyzed to determine blood lactate concentrations. RESULTS: In the WG protocol, mean (+/-SEM) blood lactate concentrations sampled over the three conditions were 0.98 +/- 0.33 mmol.L-1, 5.68 +/- 0.46 mmol.L-1, and 9.14 +/- 0.38 mmol.L-1, respectively. During the WOHG protocol, blood lactate values recorded were 0.99 +/- 0.26 mmol.L-1, 5.58 +/- 0.58 mmol.L-1, and 7.62 +/- 0.65 mmol.L-1, respectively. Differences were found (P < 0.05) from rest to 4 min after exercise for both groups. Differences in concentrations were also observed between groups at the 4-min postexercise blood-sampling stage. Peak power output values recorded using the WG protocol were also greater (1461 +/- 94 W vs 1136 +/- 88 W; P < 0.05). No differences were recorded for mean power output (MPO), fatigue index (FI), or work done (WD). CONCLUSION: Results indicate significant differences in power output and blood lactate concentrations between protocols. These findings suggest that the performance of traditional style leg-cycle ergometry requires a muscular contribution from the whole body. As such, researchers should consider this, both in terms of the allocation of ergometer loads, and in the analysis of blood-borne metabolites. |
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Authors:
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Julien Baker; Edward Brown; Gary Hill; Glen Phillips; Russell Williams; Bruce Davies |
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Publication Detail:
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Type: Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial |
Journal Detail:
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Title: Medicine and science in sports and exercise Volume: 34 ISSN: 0195-9131 ISO Abbreviation: Med Sci Sports Exerc Publication Date: 2002 Jun |
Date Detail:
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Created Date: 2002-06-05 Completed Date: 2002-07-17 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8005433 Medline TA: Med Sci Sports Exerc Country: United States |
Other Details:
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Languages: eng Pagination: 1037-40 Citation Subset: IM; S |
Affiliation:
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School of Applied Sciences, University of Glamorgan, Trefforest, Pontypridd, Wales, United Kingdom. jsbaker@glam.ac.uk |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Arm
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physiology Exercise / physiology* Exercise Test / methods Hand Strength / physiology* Humans Lactic Acid / biosynthesis*, blood Leg / physiology* Male Muscle, Skeletal / physiology* Reference Values |
| Chemical | |
Reg. No./Substance:
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50-21-5/Lactic Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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