Document Detail

A 10-week randomized trial comparing eccentric vs. concentric hamstring strength training in well-trained soccer players.
MedLine Citation:
PMID:  15387805     Owner:  NLM     Status:  MEDLINE    
PURPOSE: To compare the effects of a 10-week training program with two different exercises -- traditional hamstring curl (HC) and Nordic hamstrings (NH), a partner exercise focusing the eccentric phase -- on muscle strength among male soccer players. METHODS: Subjects were 21 well-trained players who were randomized to NH training (n = 11) or HC training (n = 10). The programs were similar, with a gradual increase in the number of repetitions from two sets of six reps to three sets of eight to 12 reps over 4 weeks, and then increasing load during the final 6 weeks of training. Strength was measured as maximal torque on a Cybex dynamometer before and after the training period. RESULTS: In the NH group, there was an 11% increase in eccentric hamstring torque measured at 60 degrees s(-1), as well as a 7% increase in isometric hamstring strength at 90 degrees, 60 degrees and 30 degrees of knee flexion. Since there was no effect on concentric quadriceps strength, there was a significant increase in the hamstrings:quadriceps ratio from 0.89 +/- 0.12 to 0.98 +/- 0.17 (11%) in the NH group. No changes were observed in the HC group. CONCLUSION: NH training for 10 weeks more effectively develops maximal eccentric hamstring strength in well-trained soccer players than a comparable program based on traditional HC.
Roald Mjølsnes; Arni Arnason; Tor Østhagen; Truls Raastad; Roald Bahr
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Publication Detail:
Type:  Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Scandinavian journal of medicine & science in sports     Volume:  14     ISSN:  0905-7188     ISO Abbreviation:  Scand J Med Sci Sports     Publication Date:  2004 Oct 
Date Detail:
Created Date:  2004-09-24     Completed Date:  2005-02-10     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9111504     Medline TA:  Scand J Med Sci Sports     Country:  Denmark    
Other Details:
Languages:  eng     Pagination:  311-7     Citation Subset:  IM    
Oslo Sports Trauma Research Center, Norwegian University of Sport and Physical Education, Oslo, Norway.
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MeSH Terms
Knee / physiology
Muscles / physiology*
Physical Education and Training / methods*
Physical Fitness
Time Factors

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