Injury Prevention in Children´s Football

Study Results

Results pending

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Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

3895 participants

Study Classification

INTERVENTIONAL

Study Start Date

2014-08-31

Study Completion Date

2015-11-30

Brief Summary

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Playing football can induce considerable beneficial health effects, but is also a high-intensity and high-impact sport with many situations of direct contact between players which bear the risk of injury. Thus, it is necessary to implement preventive measures to reduce the risk of injury and support the health benefits.

Injury characteristics of players older than 13 years are similar to adult players and, thus, similar preventive measures are beneficial. Younger players seem to show partly different injury characteristics. Consequently, preventive programmes proven effective in late adolescent or adult players need to be adapted for younger age groups. To date, no study investigated the prevention of football injuries in children under the age of 13 years.

We aim to assess the effectiveness of an exercise-based prevention program to reduce football-related injuries in children younger than 13 years.

The primary outcome in this study is the overall injury rate. Secondary outcomes are the rate of severe injuries and acute injuries.

The study is designed as a two-armed cluster-randomized controlled trial. We will recruit 9 to 12 years old children (boys and girls, born 2002 to 2005) participating in regular training and match play in an officially registered football club in Switzerland (further study centres are located in the Netherlands, Germany and the Czech Republic). The chosen age group is usually subdivided into two age categories (9/10 years, 11/12 years).

Recruitment will take place via the national and regional football associations.

Inclusion criteria are: the clubs must be officially registered in the regional football association, children must be between 9 and 12 years old at the start of the study and regular training must take place at least twice per week. Teams will be excluded, if the coaches already perform a structured warm-up focusing on neuromuscular control or an existing injury prevention programme.

Injury surveillance will include a baseline questionnaire, players´ exposure and injury registration. Anthropometric baseline data and information regarding previous football-related injuries will be obtained prior to the start of the study from the parents. Injury and exposure surveillance will be assisted by an automated internet-based injury recording system which has been developed and applied during our own epidemiological project.

For all participating teams, one contact person will be appointed. Those persons will be provided with exact instructions on injury definitions as well as examples how to complete the injury and exposure forms within the online injury recording system.

If an injury occurred, one trained person will contact the coach as well as the player and the parents by telephone and/or e-mail to assess all relevant aspects of the injury based on a standardized injury registration form. In case of injuries which require medical treatment parents will be supported to receive the exact diagnosis from the attending physician (either as specific written diagnosis or by use of a specific injury coding system). Two blinded investigators will additionally assess all information with regard to each injury to allow for objective and independent injury surveillance.

20 study assistants and 4 scientific assistants will support coaches with data collection and injury recording. Each study assistant will be responsible for eight clubs. Study assistant will regularly keep in touch with the clubs and will visit two training sessions of each team during the study period.

The intervention period will last one complete season. The injury prevention program will be included at the beginning of the usual football training by replacing the traditional warm-up. The programme will be conducted at least two times a week by the intervention teams. The prevention programme contains seven exercises and lasts about 10 to 15 min after familiarisation. Three exercises focus on unilateral, dynamic stability of the lower extremities (hopping, jumping and landing). Further, three exercises emphasize whole body and trunk stability. The last exercise contains rolling movements to improve fall technique.

The coaches of the control group will receive the instruction to regularly perform a common warm-up consisting of running and ball-based exercises (sham treatment, no neuromuscular and stability exercises).

The yearly incidence injured players in children is 8.6%. A risk reduction of one third has been recently acknowledged as a relevant effect size for injury rate. This corresponds to a reduction of the yearly incidence to 5.8% injured players. In order to achieve a statistical power of 80% and taking an allocation ratio of 1:1 and a cluster-inflation factor of 1.7 into account, in total 4´000 players are needed for statistical analysis. Assuming a realistic drop-out rate of about 33%, 6´000 children will be initially recruited.

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Detailed Description

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Conditions

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Football Injuries in Children

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

PREVENTION

Blinding Strategy

NONE

Study Groups

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Injury Prevention Programme

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Group Type EXPERIMENTAL

Injury Prevention Programme

Intervention Type OTHER

The injury prevention program will be included at the beginning of the usual football training by replacing the traditional warm-up. The programme will be conducted by the coaches at least two times a week (with exception of school holidays). The prevention programme contains seven exercises and lasts about 15 min after familiarisation. Three exercises focus on unilateral, dynamic stability of the lower extremities (hopping, jumping and landing). Further, three exercises emphasize whole body and trunk stability. The last exercise contains rolling movements to improve fall technique. The difficulty of each exercise can be progressively increased in five steps. Players start at the level of difficulty which corresponds to their current performance level. They will proceed to the next level when they perform the exercises with good control. This will be assessed by the coaches.

Control

The coaches of the control group will receive the instruction to regularly perform a common warm-up consisting of running and ball-based exercises (sham treatment, no neuromuscular and stability exercises).

Group Type NO_INTERVENTION

No interventions assigned to this group

Interventions

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Injury Prevention Programme

The injury prevention program will be included at the beginning of the usual football training by replacing the traditional warm-up. The programme will be conducted by the coaches at least two times a week (with exception of school holidays). The prevention programme contains seven exercises and lasts about 15 min after familiarisation. Three exercises focus on unilateral, dynamic stability of the lower extremities (hopping, jumping and landing). Further, three exercises emphasize whole body and trunk stability. The last exercise contains rolling movements to improve fall technique. The difficulty of each exercise can be progressively increased in five steps. Players start at the level of difficulty which corresponds to their current performance level. They will proceed to the next level when they perform the exercises with good control. This will be assessed by the coaches.

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* officially registered football club in the regional football association,
* children must be between 9 and 12 years old at the start of the study
* regular training must take place at least twice per week