Part II: Comparison of Crossfit-Related Injury Presenting to Sports Medicine Clinic by Sex and Age.

Objective: To examine CrossFit-related injuries based on sex and age. Design: Retrospective case series. Setting: A tertiary-level pediatric sports medicine clinic. Participants: CrossFit athletes. Main Outcome Measures: CrossFit-related injuries by sex (males vs females) and age groups (<= 19 years vs >19 years) using a chi(2) analysis with P = 0.05, odds ratio (OR), and 95% confidence interval (95% CI). Results: Among injured CrossFit athletes, female athletes sustained lower extremity injuries more frequently than male athletes (P = 0.011; OR, 2.65; 95% CI, 1.25-5.65). In observed CrossFit injuries, shoulder injuries were more frequently observed in male athletes compared with female athletes (P = 0.049; OR, 2.79; 95% CI, 0.98-7.95). Additionally, a greater proportion of CrossFit athletes aged 19 years and younger suffered trunk/spine injuries than those older than 19 years (P = 0.027; OR, 2.61; 95% CI, 1.10-6.21) in injured CrossFit athletes. Conclusions: The current results indicated sex- and age-specific susceptibility to CrossFit-related injuries based on body parts and diagnoses. The presented information may be useful to develop a safer exercise program, especially for pediatric and adolescent CrossFit participants.