Footnotes

• Contributors KJS, WHM and CAE contributed to the planning, conduct of analysis, interpretation and reporting of results. KMB contributed to the planning and reporting of results. All authors critically reviewed the final version of the research letter.

• Funding This study was funded by the Alberta Centre for Child, Family and Community Research (equipment and physiotherapist assessment consultations). KJS was supported by an Alberta Heritage Foundation for Medical Research studentship award at the time of this work. CAE was funded by a chair in paediatric rehabilitation funded by the Children’s Hospital Foundation (Alberta Children’s Hospital Research Institute for Child and Maternal Health). The Sport Injury Prevention Research Centre is one of the international research centres for prevention of injury and protection of athlete health supported by the International Olympic Committee.

• Competing interests None declared.

• Ethics approval Conjoint Health Research Ethics Board, University of Calgary.

• Provenance and peer review Not commissioned; internally peer reviewed.