What constitutes a "foul" in roller derby?

In roller derby, a "foul" is defined as any actions that violate the established rules of the game, consequently leading to penalties. This indicates that players must adhere to specific conduct and rules during gameplay; when these are breached—whether through illegal hits, blocking inappropriately, or other infractions—penalties are imposed on the offending player.

Understanding this concept is vital for players, as fouls not only affect individual players who may be sent to the penalty box but also impact the overall strategy and flow of the game. Recognizing the importance of rules and avoiding foul play can help teams maintain their momentum and effectiveness during a match. Other actions, such as those that enhance gameplay, score points, or promote teamwork, do not fall under the category of fouls, as they either comply with regulations or contribute positively to the match.