The Efficacy of a 10-week Intervention, Using the Nordic Hamstring Exercise, on Repeated-sprint Ability in Football (Soccer) Players - a Randomized Controlled Trial
Sponsor study identifier
interventional
35
1 country
1
Study Start
February 2016
Date type not reportedThis date has not been verified as actual or estimated.
Primary Completion
June 2016
Actual (reported)Study Completion
June 2016
Actual (reported)The purpose of the study is to investigate the efficacy of a 10-week intervention, using the Nordic Hamstring exercise, on repeated-sprint ability in male sub-elite football players. The primary outcome measure is total sprint time during 4x6 sprint of 10 meters measured using dual-beam photoelectric cells. Additionally, eccentric knee flexor strength is measured using the Nordbord hamstring strength measure. The hypothesis is that strength training of the knee flexor muscles elicited by the Nordic Hamstring exercise will result in enhanced repetitive sprint-ability expressed as a decrease in total sprint time. Furthermore, baseline data is used to assess to correlation between eccentric hamstring strength and active hamstring flexibility AND sprint performance.
Registry-reported information. Elapsed time and enrollment totals alone do not measure study progress or recruitment pace.
June 2016
Actual (reported)Click on a node to explore related trials.
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Dates and qualifiers reported by the registry. Estimated dates do not confirm that a milestone has occurred.
February 2016
Date type not reportedThis date has not been verified as actual or estimated.
February 2, 2016
Actual (reported)February 5, 2016
Actual (reported)June 2016
Actual (reported)June 2016
Actual (reported)Total sprint time measured during 4x6 sprints of 10 meters. The sprints are performed every 15s and the sets are separated by 3 minutes of rest.
Measured prior to and after the intervention period (at week 0 & 10)
Single sprint times (best sprint time, sprint time during last sprint).
Measured prior to and after the intervention period (at week 0 & 10)
Maximal eccentric knee flexor strength measured using Nordbord device
Measured prior to and after the intervention period (at week 0 & 10)
Eccentric knee flexor strength endurance measured during 12 repetitions of the Nordic Hamstring exercise using Nordbord device.
Measured prior to and after the intervention period (at week 0 & 10)
Active range of motion of hamstring muscles measured using inclinometer.
Measured prior to and after the intervention period (at week 0 & 10)
Correlation between eccentric hamstring strength and active hamstring flexibility AND sprint performance.
Measured prior to the intervention (at week 0)
The Nordic Hamstring group performs a progressive strengthening program (Mjolsnes et al., 2004) comprising of the Nordic Hamstring exercise during a period of 10 weeks. The training load increases from one session per week in week 1 to 3 sessions per week in week 3-10. Number of sets and repetitions progressively increase from 2 to 3 and 5 to 12, respectively. The exercise program is performed in the end of a regular football training session.
The control group are asked not to perform the exercise or any other specific strength training for the hamstring muscles and to continue to play football as usual.
Registry-reported names are shown in full. Names without a link have not yet been matched to a Syfrah profile.
Both the intervention and testing included in protocol will be conducted in the facilities of the included football clubs in Copenhagen, Denmark.
Copenhagen, Denmark
Mjolsnes R, Arnason A, Osthagen T, Raastad T, Bahr R. A 10-week randomized trial comparing eccentric vs. concentric hamstring strength training in well-trained soccer players. Scand J Med Sci Sports. 2004 Oct;14(5):311-7. doi: 10.1046/j.1600-0838.2003.367.x.
Ishoi L, Holmich P, Aagaard P, Thorborg K, Bandholm T, Serner A. Effects of the Nordic Hamstring exercise on sprint capacity in male football players: a randomized controlled trial. J Sports Sci. 2018 Jul;36(14):1663-1672. doi: 10.1080/02640414.2017.1409609. Epub 2017 Dec 1.
Lasse Ishøi
Hvidovre University Hospital. University of Southern Denmark
Per Hölmich
Hvidovre University Hospital. Aspetar
Per Aagaard
University of Southern Denmark
Kristian Thorborg
Hvidovre University Hospital
35 participants (actual enrollment reported by the registry).
First Submitted
February 2, 2016
First Posted
February 5, 2016
Study Start
February 2016
Date type not reportedThis date has not been verified as actual or estimated.
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Thomas Bandholm
Hvidovre University Hospital
Andreas Serner
Hvidovre University Hospital. Aspetar
Primary Completion
June 2016
Actual (reported)Study Completion
June 2016
Actual (reported)Last Updated
June 14, 2018
Record last verified: 2018-06
All individual data regarding primary and secondary outcome measures.
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Source: ClinicalTrials.gov.
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