Document Detail


High anaerobic energy release during submaximal arm exercise.
MedLine Citation:
PMID:  8435979     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The anaerobic energy release during submaximal arm (AE) and leg exercise (LE) has been estimated from O2 deficit measured at the onset of exercise. Eight male subjects were studied during 8-10 min of arm or leg cycling at the same relative workload (53% of the peak exercise-induced increase in pulmonary oxygen uptake, VO2). The workloads were 78 +/- 4 W during AE and 173 +/- 11 W during LE and VO2 was 1.51 +/- 0.06 1 min-1 for AE and 2.33 +/- 0.15 1 min-1 for LE. The half-time of the VO2 on-response was considerably longer (P < 0.01) during AE (62 +/- 9 s) than during LE (33 +/- 4 s) and the peak blood lactate concentration was higher (P < 0.05) during AE (4.8 +/- 0.5 mmol.l-1) than during LE (3.5 +/- 0.4 mmol.l-1). Oxygen deficit was 1.64 +/- 0.16 and 1.78 +/- 0.16 1 for AE and LE respectively. Oxygen deficit was higher during AE than during LE when related to absolute workload (P < 0.01), or to VO2 at steady state (P < 0.001) or to limb volume (P < 0.001). The proportion of the total energy demand covered by anaerobic energy release at the onset of exercise (0-8 min) was about 54% higher (P < 0.01) during AE than during LE. It is concluded that the energy release to a greater extend is covered by anaerobic processes during AE than during LE.
Authors:
M Jensen-Urstad; I Hallbäck; K Sahlin
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Clinical physiology (Oxford, England)     Volume:  13     ISSN:  0144-5979     ISO Abbreviation:  Clin Physiol     Publication Date:  1993 Jan 
Date Detail:
Created Date:  1993-03-19     Completed Date:  1993-03-19     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8309768     Medline TA:  Clin Physiol     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  81-7     Citation Subset:  IM    
Affiliation:
Department of Clinical Physiology, Södersjukhuset, Stockholm, Sweden.
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MeSH Terms
Descriptor/Qualifier:
Adult
Anaerobiosis
Arm / physiology*
Energy Metabolism / physiology*
Exercise / physiology*
Heart Rate / physiology
Humans
Lactates / blood
Leg / physiology
Male
Oxygen Consumption / physiology
Chemical
Reg. No./Substance:
0/Lactates

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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