Operational definitions are instrumental in determining the exact process by which research data should be collected and processed. Because operational definitions outline how data will be measured, ...

7 Australian Centre for Research into Injury in Sport and its Prevention (ACRISP), Federation University, Ballarat, Australia Concussion is the number one injury risk in contact and collision sports.

Objectives Various definitions for concussion have been proposed, each having its strengths and weaknesses. We reviewed and compared current definitions and identified criteria necessary for an ...