Source:http://linkedlifedata.com/resource/pubmed/id/17560177
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
1
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| pubmed:dateCreated |
2007-6-25
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| pubmed:abstractText |
Data on the dynamic process and time-point of manifestation of exercise-induced diaphragmatic fatigue (DF) are lacking. Therefore, this study was aimed assessing dynamic changes of diaphragmatic strength during exercise and determining the time-point of DF manifestation. Fourteen trained subjects (maximal oxygen uptake (VO2(max)) 59.3+/-5.5 ml/min/kg) performed standardized exercise protocols (maximal workload: 85% VO2(max)) followed by recovery (6 min). Ergospirometric data and twitch transdiaphragmatic pressure (TwPdi) were consecutively assessed. DF was induced (TwPdi-rest: 2.34+/-0.26 versus TwPdi-end-recovery 2.01+/-0.21 kPa, p<0.01). TwPdi progressively increased during exercise (TwPdi-rest: 2.34+/-0.26 versus TwPdi-maximal-workload: 3.28+/-0.38 kPa, p<0.001). DF was detectable immediately after exercise-termination (TwPdi-maximal-workload: 3.28+/-0.38 versus TwPdi-early-recovery 2.55+/-0.34 kPa, p<0.001). TwPdi during exercise was highly correlated to workload, VO2(max) and dyspnea (r=0.96/r=0.92/r=0.97; all p<0.0001). In conclusion, diaphragmatic strength progressively increases with increasing workload, and DF manifests after - rather than during - exercise. In addition, TwPdi is highly correlated to key-measures of ergospirometry, approving the physiological thesis that muscle strength is progressively enhanced and escapes fatiguing failure during high-intensity exercise performance.
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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 |
1569-9048
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| pubmed:author | |
| pubmed:issnType |
Print
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| pubmed:day |
15
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| pubmed:volume |
158
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| pubmed:owner |
NLM
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| pubmed:authorsComplete |
Y
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| pubmed:pagination |
88-96
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| pubmed:meshHeading |
pubmed-meshheading:17560177-Adult,
pubmed-meshheading:17560177-Body Mass Index,
pubmed-meshheading:17560177-Diaphragm,
pubmed-meshheading:17560177-Exercise,
pubmed-meshheading:17560177-Exercise Test,
pubmed-meshheading:17560177-Forced Expiratory Volume,
pubmed-meshheading:17560177-Humans,
pubmed-meshheading:17560177-Lung,
pubmed-meshheading:17560177-Muscle Fatigue,
pubmed-meshheading:17560177-Oxygen Consumption,
pubmed-meshheading:17560177-Pressure,
pubmed-meshheading:17560177-Respiratory Function Tests,
pubmed-meshheading:17560177-Respiratory Muscles,
pubmed-meshheading:17560177-Vital Capacity
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| pubmed:year |
2007
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| pubmed:articleTitle |
New physiological insights into exercise-induced diaphragmatic fatigue.
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| pubmed:affiliation |
Department of Pneumology, University Hospital Freiburg, Killianstrasse 5, D-79106 Freiburg, Germany. hans-joachim.kabitz@uniklinik-freiburg.de
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| pubmed:publicationType |
Journal Article
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