Junior high school students consistently exhibit poor health conditions. This study aimed to determine  the significance of  well-being autonomy and physical activity engagement on health condition as an outcomes. Employing predictive research design and using  simple random sampling in selecting the 150 respondents, results showed that with a combined degree of 57.04%, both well-being autonomy and physical activity significantly predict the criterion variable. Hence, the Self-Determination Theory is affirmed. Future research may explore other variables not covered in this study to account the 42.96% in variance in health condition as outcomes. Additionally, the Department of Education may  propagate well-being and physical activity engagement at all school levels.