| Effects of contraction force and frequency on postexercise hyperemia in human calf muscles. | |
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MedLine Citation:
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PMID: 7440279 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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D Richardson; R Shewchuk |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of applied physiology: respiratory, environmental and exercise physiology Volume: 49 ISSN: 0161-7567 ISO Abbreviation: J Appl Physiol Publication Date: 1980 Oct |
Date Detail:
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Created Date: 1981-02-24 Completed Date: 1981-02-24 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 7801242 Medline TA: J Appl Physiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 649-54 Citation Subset: IM; S |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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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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