Influencing factors of adolescents' leisure time physical activity based on the theory of planned behavior

Objective To evaluate the level of adolescents' leisure time physical activities,to examine and evaluate the participation of behavior theory,and to help students to foster healthy behaviors and to provide theoretical basis for further study in this field.Methods A total of 353 students aged 7-15 years old were selected to complete the questionnaires assessing the theory of planned behavior (TPB) constructs and acceleration measurements to analyze influencing factors of adolescents' leisure time physical activity.Results The average amount of adolescents' leisure time in moderate and vigorous physical activity(MVPA) was (15.26±11.21) min/d.Behavioral intention is the only direct factors accounted for 8.9%.Behavioral attitude and perceived behavioral control account for 33.2%.Subjective norms were not a significant predictor both in behavior and intention.Furthermore,intention among boys was predicted by their attitude and perceived behavior control (PBC),which accounted for 40.3%,whereas the sole predictor of intention among girls was PBC,which accounted for 27.4%.Conclusion Our adolescents' leisure physical activity level is lower than that of foreign teenagers.The analysis provided moderate support for the ability of the TPB variables to predict MVPA.