Sprint Performance in Football Players With a Previous Hamstring Injury

NCT03306511 — Completed, 44 participants, Hvidovre University Hospital

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Sprint Performance in Football Players With a Previous Hamstring Injury Compared to Healthy Controls: An Exploratory Cross-sectional Study

Registry	NCT03306511
Status	Completed
Study type	Observational
Enrollment	44 (Actual)
Sponsor	Hvidovre University Hospital (Other)
Conditions	Sprint Performance, Hamstring Injury
Interventions	Repeated-sprint test (Other)
Dates	start 2017-10-01, primary completion 2017-12-31, completion 2017-12-31, first posted 2017-10-11, last updated 2018-06-13
Locations	1 site in Denmark

-Summary

Few studies indicate that sprint performance may be impaired in football players with a previous hamstring strain injury. This exploratory cross-sectional study aim to compare sprint performance between football players with and without a previous hamstring strain injury. The findings may elucidate potential indications of insufficient rehabilitation following a hamstring strain injury.

Sprint performance data will be collected using the MySprint Iphone Application.

Due to pragmatic reasons and the exploratory nature of this study the aim is to include players on a team level.

Based on the prevalence of hamstring strain injuries the expected number of cases to be included are 10-20 football players with a previous hamstring strain injury, and a corresponding 80-90 number of healthy controls.

No outcomes will be weighted (flat outcome structure).

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+Arms and interventions

Arm	Type	Interventions	Description
Case		Other: Repeated-sprint test	Football players with a previous self-reported hamstring strain injury in the preceding 12 months
Control		Other: Repeated-sprint test	Football players without a previous self-reported hamstring strain injury in the preceding 12 months

Repeated-sprint test (Other): 6x30-meter sprint interspersed with 90-s rest

+Outcome measures

Primary outcomes

Theoretical maximal force [Baseline]: Measured using the MySprint Application during a repeated-sprint test consisting of 6x30-m sprints. The outcome measure is exploratory.
Theoretical maximal velocity [Baseline]: Measured using the MySprint Application during a repeated-sprint test consisting of 6x30-m sprints. The outcome measure is exploratory.
Theoritical maximal power output [Baseline]: Measured using the MySprint Application during a repeated-sprint test consisting of 6x30-m sprints. The outcome measure is exploratory.
Slope of the linear decrease on ratio of force as sprint velocity increases [Baseline]: Measured using the MySprint Application during a repeated-sprint test consisting of 6x30-m sprints. The outcome measure is exploratory.

+Eligibility

Sex: Male, ages: 18 Years to 35 Years

Inclusion Criteria Controls:

* Able to participate fully in regular football training and matches

Exclusion Criteria Controls:

* Self-reported hamstring strain injury resulting in loss of regular football training sessions or football matches in the preceding 12 months.
* Longstanding injury (>6 weeks) in the lower extremities or trunk in the preceding 12 months.
* Any pain in the lower extremity, pelvis, or spine during testing

Inclusion Criteria Cases:

* Able to participate fully in regular football training and matches
* Self-reported hamstring strain injury resulting in loss of regular football training sessions or football matches in the preceding 12 months.

Exclusion Criteria Cases:

* Longstanding injury (>6 weeks) in the lower extremities (except hamstring strain injury) or trunk in the preceding 12 months.
* Any pain in the lower extremity, pelvis, or spine during testing

+Locations (1)

Facility	City	Country	Status
Testing will be conducted in the facilities of the included football clubs in Copenhagen	Copenhagen, Danmark	Denmark

+Investigators

Lasse Ishøi, Principal investigator, Hvidovre University Hospital

My Notes

Public

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