Relationship Between Quality of Life, Level of Physical Activity, Physical Fitness, and Body Composition on the Academic Performance of High School Students in an Integrated Educational System.

This study examined the relationships among physical activity level (PAL), physical fitness (PF), body composition, quality of life (QoL), and academic performance (AP) in 365 Brazilian high school students aged approximately 17 years. Using multiple linear regression models, the researchers found that jump performance and age were the only significant predictors of AP and the psychological health domain of QoL, respectively, while other variables such as BMI, agility, handgrip strength, and PAL showed no significant effects. The models explained a modest proportion of variance—9.3% for AP and 7.9% for physical and psychological health domains of QoL—indicating that additional factors like socioeconomic status, dietary habits, and psychosocial variables likely influence these outcomes. The findings suggest that physical fitness and activity have limited but measurable associations with academic and psychological health in adolescents, highlighting the need for multifactorial approaches in future research and school-based interventions.