Source:http://linkedlifedata.com/resource/pubmed/id/16838187
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
6
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| pubmed:dateCreated |
2006-7-28
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| pubmed:abstractText |
A mathematical model of performance describing aerobic and anaerobic energy production during exercise was applied to middle-distance running data from world records (WR) and from a group of elite runners (NL). The model is based on the assumption that, above a critical power (Pc), a continuous rate of anaerobic energy production occurs, until the entire anaerobic stores (W') are depleted. The fraction of metabolic power above Pc provided by anaerobic metabolism is denoted alpha. A second power threshold (Pt) sets the limit above which any further increase in power is met exclusively by anaerobic sources. The oxygen uptake kinetics was described by a monoexponential equation with time constant tau. The results show that the model successfully fits the WR over 1,500-5,000 m. However, in the range of distances from 800 to 5,000 m the performance over 800 and 1,000 m were overestimated. Contrary to Pc and the anaerobic contribution at steady state oxygen uptake, the estimate of W' was sensitive to the value assigned to tau in the range from 0 to 30 s. Using best performances from 1,500 to 5,000 m in NL resulted in Pc estimates not significantly different from the metabolic power at the lactate threshold. The anaerobic contribution at steady state oxygen uptake increased from zero at Pc to 8.3% (WR) and 7.8+/-3.1% (NL) at Pt. This suggests that a substantial contribution of anaerobic processes occurs in the range between Pc and Pt, even though the exercise does not elicit maximal aerobic power.
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| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:citationSubset |
IM
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| pubmed:status |
MEDLINE
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| pubmed:month |
Aug
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| pubmed:issn |
1439-6319
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| pubmed:author | |
| pubmed:issnType |
Print
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| pubmed:volume |
97
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| pubmed:owner |
NLM
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| pubmed:authorsComplete |
Y
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| pubmed:pagination |
745-54
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| pubmed:dateRevised |
2008-11-21
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| pubmed:meshHeading |
pubmed-meshheading:16838187-Algorithms,
pubmed-meshheading:16838187-Anaerobic Threshold,
pubmed-meshheading:16838187-Computer Simulation,
pubmed-meshheading:16838187-Energy Metabolism,
pubmed-meshheading:16838187-Humans,
pubmed-meshheading:16838187-Models, Biological,
pubmed-meshheading:16838187-Oxygen Consumption,
pubmed-meshheading:16838187-Physical Exertion,
pubmed-meshheading:16838187-Running
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| pubmed:year |
2006
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| pubmed:articleTitle |
Modelling of aerobic and anaerobic energy production in middle-distance running.
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| pubmed:affiliation |
Unité de Recherche Physiologie et Physiopathologie de l'Exercice et Handicap, Université de Saint-Etienne, Saint-Etienne, France. busso@univ-st-etienne.fr
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| pubmed:publicationType |
Journal Article
|