Figure.
Aesthetic sports consisted of cheerleading, pom-pon squad, dance team, diving, and gymnastics. Endurance sports consisted of basketball, cross-country, soccer, and track (middle distance and distance). Team/anaerobic sports consisted of tennis, volleyball, swimming, softball, golf, and track (field events and sprints). Menstrual irregularity was defined as ≤9 menses in the past 12 months or menses not started by age 15 years. Musculoskeletal injury was defined as an injury that was the direct result of sport participation during the season. P values reflect the results of χ2 tests.