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Acute Hamstring Strains in Danish Elite Soccer - Prevention and Rehabilitation

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ClinicalTrials.gov Identifier: NCT00557050
Recruitment Status : Unknown
Verified September 2007 by Amager Hospital.
Recruitment status was:  Enrolling by invitation
First Posted : November 12, 2007
Last Update Posted : November 12, 2007
Information provided by:
Amager Hospital

November 9, 2007
November 12, 2007
November 12, 2007
January 2008
Not Provided
Number of acute hamstring strains [ Time Frame: one soccer season ]
Same as current
No Changes Posted
Number of ACL-injuries [ Time Frame: One soccer season ]
Same as current
Not Provided
Not Provided
Acute Hamstring Strains in Danish Elite Soccer - Prevention and Rehabilitation
Acute Hamstring Strains in Danish Elite Soccer - Prevention and Rehabilitation

A common soft tissue injury in sports involving sprinting and jumping is the hamstring strain.

Not much evidence-based research has been carried out on prevention of hamstring strains.

Most studies suggest that hamstring strains occur during the later part of the swing phase when the player is sprinting. In this phase the hamstring muscles are working to decelerate knee extension - that is, the muscle develops tension while lengthening. This means that the muscles change from functioning eccentrically to concentrically. We hypothesize that it is during this rapid change from eccentric to concentric function that the muscles are most vulnerable to injuries, and that the injuries can be prevented by increasing the eccentric muscle strength in the hamstring.

This randomized clinical trial will examine the effect of a 10-week preseason strength-training program in Danish elite soccer. The strength-training program focuses on eccentric hamstring training.

60 elite teams (1200 soccer players) will be cluster-randomized to either ordinary training or ordinary training combined with eccentric hamstring strength training. The training group will start the training program in the pre-season (10 weeks) and continue the training once a week during the following season.

Suspected hamstrings strains during the season will be examined within 3 days using ultrasound. Ultrasound verified hamstring strains will be registered, and players will start a standardized rehabilitation program.

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Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Prevention
Other: Training
10-week eccentric hamstring muscle training
Not Provided
Petersen J, Hölmich P. Evidence based prevention of hamstring injuries in sport. Br J Sports Med. 2005 Jun;39(6):319-23. Review.

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
Unknown status
March 2009
Not Provided

Inclusion Criteria:

  • Male soccer player in one of the top 4 divisions i Denmark in the 2007/08 season
  • Minimum 18 years old at the time for inclusion

Exclusion Criteria:

  • Current hamstring strain at the time for inclusion
  • Under 18 years old
Sexes Eligible for Study: Male
18 Years and older   (Adult, Senior)
Contact information is only displayed when the study is recruiting subjects
Not Provided
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Amager Hospital
Not Provided
Principal Investigator: Jesper Petersen, MD Department of Orthopaedic Surgery, Amager University Hospital, Denmark
Amager Hospital
September 2007

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP