When fitting a football helmet, which of the following is NOT a proper fitting guideline?

In the context of properly fitting a football helmet, having gaps between the helmet and the head is not a fitting guideline that should be followed. A correctly fitted helmet should snugly conform to the player's head to provide effective protection. Any gaps could lead to movement during play, increasing the risk of injury since the helmet may not adequately absorb and cushion impacts to the skull.

Proper fitting guidelines emphasize that the helmet should align closely with the head without any significant spaces, ensuring both comfort and safety. This snug fit helps keep the helmet stabilized, preventing any excessive shifting, which is essential during physical activity like football where impacts are frequent. Additionally, aligning the ear holes correctly allows for optimal fit and comfort, while wetting the player's hair is a method sometimes used to help achieve a more accurate fit by allowing the helmet to mold slightly to the contours of the head.

Overall, adhering to proper fitting guidelines, such as ensuring there are no gaps and that the helmet itself is stable, is crucial for the safety of the player.