Mindful eating is a condition in which a person becomes aware of the moment while eating. Very few studies have investigated eating awareness in environments where physical activity is performed. The aim of this study is to investigate whether the duration and intensity of physical activity in adolescents aged 15-17 affects their nutritional awareness. 1117 adolescents aged 15-17 and one parent of each were involved in the study. It is a cross-sectional study. Personal information form, International Physical Activity Questionnaire Short Form (IPAQ-SF) and Mindful Eating Questionnaire (MEQ-30) were used as data collection tools. There were no group differences between scores of vigorous actives and moderate actives from MEQ-30 total and subsamples in eating control, eating discipline and mindful eating, but there was difference between both groups and inactives group (p < 0.05). Inactives group had the highest level in emotional eating; there was group difference between vigorous actives and moderate actives (p< 0.05). The results suggest that there are useful items for exploring more about mindful eating, because the differences between mindful eating total and its subsamples and physical activity are important. A better understanding of mindful eating can lead to the development of more effective intervention strategies to address the risk of overweight and obesity in adolescents.