Repeated-sprint Ability Clinical Trial
Official title:
The Efficacy of a 10-week Intervention, Using the Nordic Hamstring Exercise, on Repeated-sprint Ability in Football (Soccer) Players - a Randomized Controlled Trial
| NCT number | NCT02674919 |
| Other study ID # | NHE-2016-LI |
| Secondary ID | |
| Status | Completed |
| Phase | N/A |
| First received | |
| Last updated | |
| Start date | February 2016 |
| Est. completion date | June 2016 |
| Verified date | June 2018 |
| Source | Hvidovre University Hospital |
| Contact | n/a |
| Is FDA regulated | No |
| Health authority | |
| Study type | Interventional |
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.
| Status | Completed |
| Enrollment | 35 |
| Est. completion date | June 2016 |
| Est. primary completion date | June 2016 |
| Accepts healthy volunteers | Accepts Healthy Volunteers |
| Gender | Male |
| Age group | 17 Years to 35 Years |
| Eligibility |
Inclusion Criteria: - Sub-elite Danish football player - Age 17-35. - Able to participate fully in competitive football activities at the time of testing Exclusion Criteria: - Hamstring pain resulting in loss of training and matches 2 months prior to study initiation. - Specific systematic strength training of the hamstring muscles (>1/week) in the preceding 2 months before study initiation. - Specific systematic sprint training (>1/week) in the preceding 2 months before study initiation. - Longstanding injury (>6 weeks) in the lower extremities in the preceding 6 months to study initiation. |
| Country | Name | City | State |
|---|---|---|---|
| Denmark | Both the intervention and testing included in protocol will be conducted in the facilities of the included football clubs in Copenhagen, Denmark. | Copenhagen |
| Lead Sponsor | Collaborator |
|---|---|
| Hvidovre University Hospital | Aspetar, University of Southern Denmark |
Denmark,
Mjølsnes R, Arnason A, Østhagen 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. — View Citation
| Type | Measure | Description | Time frame | Safety issue |
|---|---|---|---|---|
| Primary | 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) | ||
| Secondary | Single sprint times (best sprint time, sprint time during last sprint). | Measured prior to and after the intervention period (at week 0 & 10) | ||
| Secondary | Maximal eccentric knee flexor strength measured using Nordbord device | Measured prior to and after the intervention period (at week 0 & 10) | ||
| Secondary | 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) | ||
| Secondary | Active range of motion of hamstring muscles measured using inclinometer. | Measured prior to and after the intervention period (at week 0 & 10) | ||
| Secondary | Correlation between eccentric hamstring strength and active hamstring flexibility AND sprint performance. | Measured prior to the intervention (at week 0) |