Does physical activity reinforce adolescents’ body-esteem? A cross-sectional study from Finland

Abstract Background Physical activity promotes a positive physical self-image, but less is known about whether the positive effect covers the general self-evaluation of adolescent appearance. The purpose of the study was to explore the association between physical activity and body-esteem in 15-year-old Finnish adolescents, via a country-representative cross-sectional study. Methods The data for the study were drawn from the Health Behaviour in School-aged Children (HBSC) study from 122 schools, comprising 15-year-old adolescents (N=1956) in Finland in 2014. The main measures were self-reported (i) moderate-to-vigorous physical activity (MVPA) and (ii) Body-esteem Scale for Adolescents and Adults (BESAA). The measures also covered other relevant factors for body image, as highlighted in previous studies. A mixed effects linear regression analysis for body-esteem was conducted. The explanatory variables included were (i) MVPA; (ii) weight status, as defined by the international (IOTF) body mass index with cut-offs for thinness, overweight, and obesity; (iii) self-esteem; and (iv) socio-economic status. The covariates in the model were maturation state and ethnic background. Results In both genders, the body-esteem score increased linearly with physical activity. It was highest among adolescents who reported having been engaged in MVPA corresponding to the international recommendation for adolescents’ physical activity. MVPA was a significant determinant for body-esteem in boys, but not in girls. In both genders, lower body-esteem was in part explained by obesity, but general self-esteem was by far the most significant factor determining body-esteem. Conclusions The several positive effects of physical activity provide feasible explanations as to why body-esteem was higher among physically active adolescents than among those who were less physically active. However, physical activity was a significant determinant for body-esteem only in boys. The difference between genders should be taken into consideration in efforts to promote health and physical activity.