Sprint Performance in Football Players With a Previous Hamstring Injury

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

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).

Study Overview

• Status: Completed
• Conditions: Hamstring Injury; Sprint Performance
• Intervention / Treatment: Other: Repeated-sprint test

• Study Type: Observational
• Enrollment (Actual): 44

Contacts and Locations

Study Locations

• Denmark
  • Danmark
    • Copenhagen, Danmark, Denmark, 1904
      • Testing will be conducted in the facilities of the included football clubs in Copenhagen

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 35 years (Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: Male

• Sampling Method: Non-Probability Sample

Study Population

Danish competitive football players

Description

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

Study Plan

How is the study designed?

Number of groups / cohorts

2

Cohorts and Interventions

Group / Cohort	Intervention / Treatment
Case; Football players with a previous self-reported hamstring strain injury in the preceding 12 months	Other: Repeated-sprint test; 6x30-meter sprint interspersed with 90-s rest
Control; Football players without a previous self-reported hamstring strain injury in the preceding 12 months	Other: Repeated-sprint test; 6x30-meter sprint interspersed with 90-s rest

What is the study measuring?

Primary Outcome Measures

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

Collaborators and Investigators

• Sponsor: Hvidovre University Hospital
• Investigators: Principal Investigator: Lasse Ishøi, Hvidovre University Hospital

Study record dates

Study Major Dates

• Study Start (Actual): October 1, 2017
• Primary Completion (Actual): December 31, 2017
• Study Completion (Actual): December 31, 2017

Study Registration Dates

• First Submitted: October 5, 2017
• First Submitted That Met QC Criteria: October 10, 2017
• First Posted (Actual): October 11, 2017

Study Record Updates

• Last Update Posted (Actual): June 13, 2018
• Last Update Submitted That Met QC Criteria: June 12, 2018
• Last Verified: June 1, 2018

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Wounds and Injuries
• Other Study ID Numbers: SPRINT2017

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No