Comparing differences in head impact characteristics between weight classes in professional mixed martial arts

Purpose: The purpose of this study was to compare the differences in frequency, and location of head impact events per match between lightweight and heavyweight MMA fighters. Methods: 30 videos of professional MMA bouts were viewed to document all impacts to the head. Independent sample t-tests were completed for statistical analysis. Results: No significant differences in head impact frequency between lightweight and heavyweight fighters were found. Impacts to the side of the head as well as the mental region were the most common impact locations. Lightweight and heavyweight MMA fighters from this study experienced on average, lower frequency of head impacts than boxers, however differences in head-impact events between the two sports highlights the importance of also determining the effects of impact magnitudes in the future. Conclusions: The frequency and location of head impacts were similar in both weight classes