The aim of the current study is to investigate the interaction between gender and physical activity with the three variables (subjective happiness, self-esteem and body image). More specifically, we will test if there is a difference between the variables (subjective happiness, self-esteem and body image) and if any gender differences are present. Method: A hundred and eleven (111) adolescent students (58 girls, 53 boys) who ranged in age from 13 to 17 years participated in the study. Because the participants were adolescents, their parents first completed the inform consent for their child's participation. Then the students completed demographic factors in order to allocate them in exercisers or no-exercisers and sexual orientation and the three questionnaires. A 2 (exercisers, non-exercisers) × 2 (male, female) × 3