Objectives: The aim of this paper was to explore connection between aspects of self and levels of physical activity among adolescents.
Methods: An international sample of 501 elementary school students (mean age 14.7 ± 0.9 years, 48.5% males) from the Slovak and Czech Republics completed the Self-competence/Self-liking Scale, the Rosenberg's Self-esteem Scale, the Self-efficacy Scale and a question on their physical activity. Respondents were divided into three groups: (1) no physical activity; (2) infrequent physical activity; (3) everyday physical activity. Data were explored with one-way analysis of variance (ANOVA) separately for each gender.
Results: Boys with no physical activity had lower self-liking and social self-efficacy in comparison with boys with everyday physical activity. Girls with no physical activity had lower positive self-esteem, self-liking, self-competence, general and social self-efficacy and higher negative self-esteem in comparison with girls with infrequent and everyday physical activity.
Conclusion: Regular physical activity is connected with psychological aspects of self among adolescents, especially girls. Incorporating physical activity into the life of youths on a regular basis might lead to the enhancement of their feelings of self-worth and self-efficacy.