Participants in high-impact sports under the age of 19 are more susceptible to brain injury, it has been asserted.
Dr Edward Reisman urged teenage players of American football and hockey to exercise caution on the field, especially when they have already taken one hit, the Spokesman relayed.
He is a sports medicine specialist at Family Medicine Spokane and explained a second collision could be made more dangerous by the fact decision-making skills can be impaired by an initial impact.
"The consequences could be quite severe," Dr Reisman told the news provider.
Dr PZ Pearce, a medic for the Spokeane Chiefs hockey team, added referees should also play their part in reducing youngsters' chances of developing a serious head ailment.
He recalled a recent incident at a game where a ref ordered a player onto the sidelines to recover from a "big hit".
Another medical professional who has voiced concerns about brain injuries in sports recently is Dr Richard Parkinson.
He told the Sydney Morning Herald officials should consider outlawing body-check tackles.
Serious Law, award winning brain injury law firm