An interventional study of Nordic Hamstring and Control in Repeated-sprint Ability, sponsored by Hvidovre University Hospital. Completed at 1 site in Denmark. Open to male participants aged 17 Years to 35 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2018-06-14.
Sponsored by Hvidovre University Hospital · Not applicable, Interventional, and Other
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.
Hvidovre University Hospital is the lead sponsor of 295 studies on the registry; 21 are open to participants now.
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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.
Other: Nordic Hamstring
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.
Other: Control
Also known as: Hamstring lowers, Nordic lowers, Hamstring Curl
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.
Time frame: Measured prior to and after the intervention period (at week 0 & 10)
Single sprint times (best sprint time, sprint time during last sprint).
Time frame: Measured prior to and after the intervention period (at week 0 & 10)
Maximal eccentric knee flexor strength measured using Nordbord device
Time frame: 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.
Time frame: Measured prior to and after the intervention period (at week 0 & 10)
Active range of motion of hamstring muscles measured using inclinometer.
Time frame: Measured prior to and after the intervention period (at week 0 & 10)
Correlation between eccentric hamstring strength and active hamstring flexibility AND sprint performance.
Time frame: Measured prior to the intervention (at week 0)
Plan to share: Yes — All individual data regarding primary and secondary outcome measures.
This study is completed, as verified in Jun 2018. You cannot join it, but the record below documents what was studied.
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Hvidovre University Hospital