| Strength after bouts of eccentric or concentric actions. | |
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MedLine Citation:
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PMID: 1406179 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study examined the influence of an initial bout of eccentric or concentric actions and a subsequent bout of eccentric actions on muscular strength. Twenty-four healthy males, 24-45 yr old, were placed in three groups that performed eccentric actions in bouts 1 and 2 (ECC/ECC, N = 8), concentric actions in bout 1, and eccentric actions in bout 2 (CON/ECC, N = 8) or served as controls (N = 8). Bouts involved unilateral actions with the left and right quadriceps femoris. Ten sets of 10 repetitions with an initial resistance equal to 85% of the eccentric or concentric one repetition maximum (1 RM) were performed for each bout. Three minutes of rest were given between sets and 3 wk between bouts. Two weeks before bout 1 and 1, 4, 7, and 10 d after bouts 1 and 2, eccentric and concentric 1 RM were measured for the right quadriceps femoris and a speed-torque relation established for the left quadriceps femoris. Eccentric and concentric 1 RM decreased (P less than 0.05) 32% 1 d after bout 1 for group ECC/ECC. The speed-torque relation was down-shifted (P less than 0.05) 38%. Eccentric 1 RM and eccentric and isometric torque returned to normal 6 d later. Concentric 1 RM and torque at 3.14 rad.s-1 had not recovered on day 10 (-7% for both, P less than 0.05). Decreases in strength after bout 2 for group ECC/ECC only occurred on day (-9% for concentric 1 RM and 16% downshift of the speed-torque relation).(ABSTRACT TRUNCATED AT 250 WORDS) |
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Authors:
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C L Golden; G A Dudley |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Medicine and science in sports and exercise Volume: 24 ISSN: 0195-9131 ISO Abbreviation: Med Sci Sports Exerc Publication Date: 1992 Aug |
Date Detail:
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Created Date: 1992-10-26 Completed Date: 1992-10-26 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8005433 Medline TA: Med Sci Sports Exerc Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 926-33 Citation Subset: IM; S |
Affiliation:
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Department of Exercise and Sport Science, University of Florida, Gainesville, 32611. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Exercise / physiology* Humans Male Middle Aged Movement / physiology* Muscles / physiology* Thigh / physiology |
| Investigator | |
Investigator/Affiliation:
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G A Dudley / NASA KSC |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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