| A weekly bout of eccentric exercise is sufficient to induce health-promoting effects. | |
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MedLine Citation:
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PMID: 20508540 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: The effects of chronic eccentric-only versus concentric-only exercise on muscle physiology and blood biochemistry were investigated. METHODS: Twenty women performed on an isokinetic dynamometer a concentric (n = 10;mean ± SEM: age = 21.0 ± 0.4 yr, body fat = 22.0% ± 0.9%) or an eccentric (n = 10, age = 20.0 ± 0.3 yr, body fat = 23.2% ± 0.7%) exercise session using the knee extensors of both lower limbs once a week for eight subsequent weeks. Muscle function (isometric, concentric, and eccentric peak torque, range of movement, and soreness) was evaluated before, immediately after, and 48 h postexercise in each one of the eight training weeks. Body fat, resting energy expenditure (REE), lipid, and carbohydrate oxidation rate as well as blood chemistry measurements (lipid, lipoprotein and apolipoprotein profile, glucose, insulin, glycosylated hemoglobin, and creatine kinase) were examined before and 48 h postexercise at the first and eighth week of training. RESULTS: Acute eccentric exercise increased REE and fat oxidation at week 1 (12.7% and 12.9%, respectively) and at week 8 (0.7% and 2.8%, respectively). Chronic eccentric exercise increased resting REE and fat oxidation at week 8 compared with week 1 (5.0% and 9.9%, respectively). Acute eccentric exercise improved blood lipid profile at week 1 and week 8. Chronic eccentric exercise improved resting blood lipid profile at week 8. Acute eccentric exercise increased insulin resistance at week 1 but not at week 8. Chronic eccentric exercise decreased resting insulin resistance at week 8. CONCLUSION: It is reported for the first time that only 30 min of eccentric exercise per week for 8 wk was sufficient to improve health risk factors. |
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Authors:
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Vassilis Paschalis; Michalis G Nikolaidis; Anastasios A Theodorou; George Panayiotou; Ioannis G Fatouros; Yiannis Koutedakis; Athanasios Z Jamurtas |
Publication Detail:
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Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Medicine and science in sports and exercise Volume: 43 ISSN: 1530-0315 ISO Abbreviation: Med Sci Sports Exerc Publication Date: 2011 Jan |
Date Detail:
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Created Date: 2011-04-19 Completed Date: 2011-08-01 Revised Date: 2012-01-03 |
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: 64-73 Citation Subset: IM; S |
Affiliation:
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Institute of Human Performance and Rehabilitation, Center for Research and Technology-Thessaly, Trikala, Greece. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Carbohydrate Metabolism
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physiology Cholesterol / blood Diet Records Energy Metabolism / physiology* Exercise / physiology* Female Humans Insulin Resistance / physiology Lipolysis / physiology Muscle, Skeletal / physiology* Quadriceps Muscle / physiology Time Factors Triglycerides / blood Young Adult |
| Chemical | |
Reg. No./Substance:
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0/Triglycerides; 57-88-5/Cholesterol |
| Comments/Corrections | |
Comment In:
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Med Sci Sports Exerc. 2011 Sep;43(9):1808; author reply 1809
[PMID:
22113175
]
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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