Document Detail

Serum carbonic anhydrase III, an enzyme of type I muscle fibres, and the intensity of physical exercise.
MedLine Citation:
PMID:  2500639     Owner:  NLM     Status:  MEDLINE    
The effects of 30 min running with stepwise increasing intensity (exhaustive, energy demand approx. 50----100% of VO2max), 60 s supramaximal running (anaerobic, greater than or equal to 125% of VO2max) and 40-60 min low-intensity running (aerobic, 40-60% of VO2max) on serum concentration of muscle-derived proteins were studied in 5 male and 5 female elite orienteerers. S-Carbonic anhydrase III (S-CA III) was used as a marker of protein leakage from type I (slow oxidative) muscle fibres and S-myoglobin (S-Mb) as a non-selective (type I + II) muscular marker. The fractional increase in S-CA III (delta S-Ca III) was 0.37 +/- 0.09 (mean +/- SEM, p less than 0.001), 0.10 +/- 0.05 (N. S.) and 0.46 +/- 0.09 (p less than 0.001) 1 h after exhaustive, anaerobic and aerobic exercise, respectively. The corresponding values for delta S-Mb were 1.45 +/- 0.36 (p less than 0.001), 0.39 +/- 0.13 (p less than 0.01) and 0.67 +/- 0.18 (p less than 0.001). The value for the delta S-CA III/delta S-Mb ratio was 0.68 +/- 0.03 after the aerobic exercise, but only 0.25-0.26 (p vs. aerobic exercise less than 0.001) after the two high-intensity forms of exercise. Since type I fibres of skeletal muscle are known to be responsible for power production during low-intensity exercise, whereas fibres of both type I and type II are active at higher intensities, the delta S-CA III/delta S-Mb ratio may depend on the recruitment profile of type I vs. type I + II fibres.
T E Takala; P Rahkila; E Hakala; J Vuori; J Puranen; K Väänänen
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Pflügers Archiv : European journal of physiology     Volume:  413     ISSN:  0031-6768     ISO Abbreviation:  Pflugers Arch.     Publication Date:  1989 Mar 
Date Detail:
Created Date:  1989-08-04     Completed Date:  1989-08-04     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0154720     Medline TA:  Pflugers Arch     Country:  GERMANY, WEST    
Other Details:
Languages:  eng     Pagination:  447-50     Citation Subset:  IM    
Department of Sports Medicine, Deaconess Institute of Oulu, Finland.
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MeSH Terms
Carbonic Anhydrases / blood,  metabolism*
Creatine Kinase / blood,  metabolism
Muscle Proteins / metabolism*
Muscles / enzymology
Myoglobin / metabolism
Oxygen Consumption
Serum Albumin / metabolism
Reg. No./Substance:
0/Muscle Proteins; 0/Myoglobin; 0/Serum Albumin; EC Kinase; EC Anhydrases

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