Abstract
This study explored the relationship between physical activity, sedentary lifestyle, and academic performance among first-year college students enrolled in Physical Education courses at Liceo de Cagayan University during the second semester of the 2024–2025 academic year. Guided by the Activation Theory, Health Belief Model, and Ecological Model of Health Behavior, the research aimed to determine the participants’ engagement in physical activity across work, travel, and recreation; their sedentary habits in various domains; and how these behaviors relate to academic performance. A predictive correlational research design was employed involving 306 students. Data were gathered using structured questionnaires and analyzed using descriptive statistics, Pearson's correlation, and multiple regression. The findings showed that although students engaged in moderate levels of physical activity, sedentary behavior was widespread, especially during schoolwork. Both physical activity and a sedentary lifestyle were significantly correlated with academic performance. Notably, recreational physical activity positively predicted academic success, whereas leisure-time sedentary behaviors negatively influenced academic success. The findings emphasize the need to promote balanced routines that reduce sedentary behavior and enhance active behaviors. The study provides critical insights for educators and administrators in developing wellness-centered curricula and support systems that align physical health with academic achievement.