Document Detail


Effects of contraction force and frequency on postexercise hyperemia in human calf muscles.
MedLine Citation:
PMID:  7440279     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The purpose of this study was to examine the separate effects of contraction force and frequency on postexercise hyperemia in the human calf muscle. Nine male subjects were used. Each was seated in a chair with the right foot on a pedal coupled to a load cell and the knee secured. Calf muscle blood flow, measured by a Whitney gauge, was determined before and periodically after 3-pmin bouts of rhythmic isometric plantar-flexor exercise. The contraction frequency was graded from 20 to 50 to 80 contractions/min. The force per contraction was graded from 7.5 to 15 to 30% of maximum voluntary contraction (MVC) of the calf muscle. The average MCV was 502 lb. Peak postexercise blood flow (PBF) increased with either increasing frequency at a given force or increasing force at a given frequency. However, at the higher levels of exercise, PBF tended to plateau at a value of about 50 ml.min-1.100 ml-1. The plateau phase of PBF was associated with a substantial increase in the total volume of postexercise hyperemia. This appeared to be well above any repayment of a blood flow deficit. However, it is not certain that the extra volume represented the repayment of a true blood flow debt.
Authors:
D Richardson; R Shewchuk
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of applied physiology: respiratory, environmental and exercise physiology     Volume:  49     ISSN:  0161-7567     ISO Abbreviation:  J Appl Physiol Respir Environ Exerc Physiol     Publication Date:  1980 Oct 
Date Detail:
Created Date:  1981-02-24     Completed Date:  1981-02-24     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  7801242     Medline TA:  J Appl Physiol Respir Environ Exerc Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  649-54     Citation Subset:  IM; S    
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MeSH Terms
Descriptor/Qualifier:
Adult
Humans
Hyperemia / physiopathology*
Isometric Contraction*
Male
Muscle Contraction*
Muscles / blood supply,  physiology
Physical Exertion*
Regional Blood Flow
Time Factors

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


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