Recommendation 1.1     Mouthguard use should be supported in child and adolescent ice hockey.

• (GRADE quality rating: low; Level of evidence: B).

Recommendation 1.2     Policy disallowing bodychecking should be supported for all children and most levels of adolescent ice hockey.

• (GRADE quality rating: High quality; Level of evidence: A)

Recommendation 1.3     Strategies limiting contact practice in American football should inform related policy and recommendations for all levels.

• (GRADE quality rating: low; Level of evidence: B).

Recommendation 1.4     Neuromuscular training warm-up programs are recommended, based on research in rugby, while more research is needed for females and other team sports. The focus should be on exercise components targeting concussion prevention.

• (GRADE quality rating: moderate; Level of evidence: B).

Recommendation 1.5     Policy mandating optimal concussion management strategies to reduce recurrent concussion rates is recommended.

• (GRADE quality rating: very low; Level of evidence: B).

Recommendation 2.1: Prior body checking experience in ice hockey games was not associated with lower overall concussion rates when adolescent players played in leagues permitting body checking, suggesting no overall unintended consequences of policy disallowing body checking to refuse policy recommendation above.

• GRADE quality rating: moderate; Level of evidence: B

Recommendation 2.2: Future research should consider evaluation of unintended consequences of concussion prevention strategies across all contexts.

(Recommendations are adapted from the Amsterdam International Consensus Statement on Concussion in Sport)