Document Detail

Muscle strength and power changes during maximal isokinetic training.
MedLine Citation:
PMID:  750845     Owner:  NLM     Status:  MEDLINE    
This study investigated the effects of short duration, high intensity training on skeletal muscle. The extensors and flexors of the knee were tested and exercised by means of an isokinetic dynamometer. Measurements of peak torque were obtained at velocities ranging from 0 degrees/sec (isometric) to 300 degrees/sec through a distance of 90 degrees. Total work output was measured during repeated knee extensions and flexions for work tasks of 6 sec and 30 sec duration. A 1-min test of repeated maximal contractions was administered to examine muscular fatiguability before and after training. The subjects trained one leg with repeated 6 sec exercise bouts, while the other leg was trained using repeated 30 sec bouts. All training and testing was executed at near maximal force and at a constant velocity (180 degrees/sec). The subjects trained four times per week for a period of seven weeks. The daily work output was equal for the 6 and 30 sec training legs. Results indicate that: (1) isokinetic training programs of 6 and 30 seconds duration can significantly (P less than .05) increase peak muscular torque; (2) training velocity may be an important consideration in improving peak torque; (3) total work output was increased an average of 30% with either training at relatively slow (60 degrees/sec) or fast (180 degrees/sec) velocities; (4) both training programs significantly reduced the fatiguability of the knee extensor muscles.
G R Lesmes; D L Costill; E F Coyle; W J Fink
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Medicine and science in sports     Volume:  10     ISSN:  0025-7990     ISO Abbreviation:  Med Sci Sports     Publication Date:  1978  
Date Detail:
Created Date:  1979-07-16     Completed Date:  1979-07-16     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0203246     Medline TA:  Med Sci Sports     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  266-9     Citation Subset:  IM; S    
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MeSH Terms
Knee Joint / physiology
Muscle Contraction*
Muscle Tonus
Muscles / metabolism
Physical Education and Training / methods*
Physical Exertion

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

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