| Effects of isokinetic strength training on concentric and eccentric torque development in the ankle dorsiflexors of older adults. | |
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MedLine Citation:
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PMID: 11034219 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study quantifies concentric and eccentric dorsiflexor muscle torque at various movement velocities and determines the neuromuscular effects from short-term practice of repeated maximal voluntary contractions using an isokinetic resisted exercise program in older adults. Twenty-eight subjects (76.3+/-4.6 years) trained concentric and eccentric dorsiflexion 3 days per week for 2 weeks at 30 degrees, 90 degrees, and 180 degrees/s through 40 degrees of dorsiflexion range of motion. Peak torque, rate of torque development, surface electromyography, and strength curves at each velocity were compared before and after training. Increases were found for concentric (27%) and eccentric (20%) dorsiflexor peak torque and concentric rate of torque production (20%-53%) across all movement velocities (p < .01). Training also significantly increased dorsiflexor concentric (64%) and eccentric (55%) surface electromyography; taken together, this is evidence of apparent adaptation of neural factors in older adults with short-term training. These findings support that eccentric and concentric strength training enhances the control and production of ankle muscle dorsiflexor torque in older adults, with implications for improving functional mobility of the ankle joint. |
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Authors:
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D M Connelly; A A Vandervoort |
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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: The journals of gerontology. Series A, Biological sciences and medical sciences Volume: 55 ISSN: 1079-5006 ISO Abbreviation: J. Gerontol. A Biol. Sci. Med. Sci. Publication Date: 2000 Oct |
Date Detail:
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Created Date: 2000-10-16 Completed Date: 2000-10-25 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9502837 Medline TA: J Gerontol A Biol Sci Med Sci Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: B465-72 Citation Subset: AIM; IM |
Affiliation:
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School of Rehabilitation Therapy, Physical Therapy Program, Faculty of Health Sciences, Queen's University, Kingston, Ontario, Canada. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aged Aged, 80 and over Ankle / physiology* Electromyography Female Humans Leg / physiology Male Muscle Contraction / physiology Muscle, Skeletal / physiology* Physical Education and Training* Torque |
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