Document Detail


A weekly bout of eccentric exercise is sufficient to induce health-promoting effects.
MedLine Citation:
PMID:  20508540     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
Vassilis Paschalis; Michalis G Nikolaidis; Anastasios A Theodorou; George Panayiotou; Ioannis G Fatouros; Yiannis Koutedakis; Athanasios Z Jamurtas
Publication Detail:
Type:  Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't    
Journal Detail:
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:
Created Date:  2011-04-19     Completed Date:  2011-08-01     Revised Date:  2012-01-03    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  64-73     Citation Subset:  IM; S    
Affiliation:
Institute of Human Performance and Rehabilitation, Center for Research and Technology-Thessaly, Trikala, Greece.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Carbohydrate Metabolism / 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:
0/Triglycerides; 57-88-5/Cholesterol
Comments/Corrections
Comment In:
Med Sci Sports Exerc. 2011 Sep;43(9):1808; author reply 1809   [PMID:  22113175 ]

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


Previous Document:  Older adults underestimate RPE and knee extensor torque as compared with young adults.
Next Document:  Plasma pentraxin 3 concentration increases in endurance-trained men.