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    Intramural (IM) sports engage boys in more physical activity than interscholastic (IS) sports. Soccer, basketball, and track consistently offer the highest activity levels for students.

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    Area of Science:

    • Pediatric Exercise Science
    • Sports Medicine
    • Public Health

    Background:

    • Physical activity is crucial for child development and overall health.
    • School sports programs are a key venue for promoting physical activity among adolescents.
    • Understanding differences in physical activity levels between intramural (IM) and interscholastic (IS) sports is important for optimizing student engagement.

    Purpose of the Study:

    • To compare the physical activity engagement levels of children participating in intramural (IM) versus interscholastic (IS) school sports.
    • To identify specific sports that promote higher levels of physical activity regardless of the delivery model.

    Main Methods:

    • An observational, cross-sectional study was conducted involving 6,735 middle-school students across four schools in North Carolina.
    • Physical activity was assessed using the System for Observation Play and Leisure Among Youth (SOPLAY), measuring sedentary, moderate, and vigorous activity.
    • Energy expenditure and intensity were estimated using Metabolic Equivalent of Task (MET) values, with statistical analyses including t-tests and generalized linear models.

    Main Results:

    • Intramural (IM) sports demonstrated higher average MET values compared to interscholastic (IS) sports.
    • A significant interaction between sport delivery model and gender was observed: boys were more active in IM sports than IS sports, while girls' activity levels did not differ significantly between models.
    • Soccer, basketball, and track were identified as sports providing the highest physical activity levels across both IM and IS settings.

    Conclusions:

    • Intramural sports appear to be more effective in increasing physical activity for boys compared to interscholastic sports.
    • Specific sports like soccer, basketball, and track are consistently associated with higher physical activity levels.
    • School administrators should consider program structures and sport selection to maximize physical activity engagement and efficiently utilize resources.