Document Detail

Effects of epinephrine and lactate on the increase in oxygen consumption of nonexercising skeletal muscle after aerobic exercise.
MedLine Citation:
PMID:  11092428     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to measure O2 consumption of nonexercising skeletal muscles (VO2nonex) at rest and after aerobic exercise and to investigate the stimulant factors of O2 consumption. In experiment 1, we measured the resting metabolic rate of the finger flexor muscles in seven healthy males by 31P-magnetic resonance spectroscopy during a 15 min arterial occlusion. In experiment 2, the VO2nonex of the finger flexor muscles was measured using near infrared continuous wave spectroscopy at rest, immediate postexercise, and 3, 5, 10, 15, and 20 min following a cycling exercise at a workload corresponding to 50% of peak pulmonary O2 uptake for 20 min. We also monitored deep tissue temperature in the VO2nonex measurement area and determined catecholamines and lactate concentrations in the blood at rest and immediate postexercise. VO2nonex at rest was 1.1 +/- 0.1 microM O2/S (mean +/- standard error) and VO2nonex after exercise increased 59.6 +/- 7.2% (p < 0.001) from the resting values. There were significant correlations between the increase in VO2nonex and the increase in epinephrine concentration (p < 0.01), and between the increase in VO2nonex and the increase in lactate concentration (p < 0.05). These results suggest that epinephrine and lactate concentrations are important VO2nonex stimulant factors.
M Murakami; T Katsumura; T Hamaoka; T Osada; T Sako; H Higuchi; K Esaki; R Kime; T Shimomitsu
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Publication Detail:
Type:  Comparative Study; Evaluation Studies; Journal Article    
Journal Detail:
Title:  Journal of biomedical optics     Volume:  5     ISSN:  1083-3668     ISO Abbreviation:  J Biomed Opt     Publication Date:  2000 Oct 
Date Detail:
Created Date:  2001-01-31     Completed Date:  2001-02-22     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9605853     Medline TA:  J Biomed Opt     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  406-10     Citation Subset:  IM    
Tokyo Medical University, Department of Preventive Medicine and Public Health, Japan.
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MeSH Terms
Body Temperature / physiology
Epinephrine / metabolism*
Exercise / physiology*
Lactic Acid / metabolism*
Muscle, Skeletal / metabolism*
Oxygen Consumption / physiology*
Reference Values
Rest / physiology*
Spectroscopy, Near-Infrared
Sympathomimetics / metabolism*
Reg. No./Substance:
0/Sympathomimetics; 50-21-5/Lactic Acid; 51-43-4/Epinephrine

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

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