title: An extended version of the theory of planned behaviour: the role of self-efficacy and past behaviour in predicting the physical activity of Chinese adolescents.
abstract: This study aimed to use an extended theory of planned behaviour (TPB), which incorporated additional self-efficacy and past behaviour, to predict the intention to engage in moderate-to-vigorous physical activity (MVPA) and the MVPA level of Chinese adolescents. Questionnaires that focused on MVPA, attitude, subjective norm, perceived behavioural control (PBC), self-efficacy and past behaviour related to the MVPA engagement were administered to a sample of 488 young people. Multiple regression analyses provided moderate support for TPB. Three TPB constructs predicted 28.7% of the variance in intentions to engage in MVPA, and that PBC, but not intention, explained 3.4% of the variance in MVPA. Self-efficacy significantly affected intention and behaviour over and above the influence of TPB. Past behaviour had a small but significant improvement in the prediction of intention, but no improvement in the prediction of MVPA. Based on the results, interventions should target adolescent self-efficacy and PBC in physical activity participation.
authors.affiliation: a School of Leisure Sports and Art , Shanghai University of Sport , Shanghai , China.
authors.forename: Lijuan
authors.initials: L
authors.lastname: Wang
authors.affiliation: a School of Leisure Sports and Art , Shanghai University of Sport , Shanghai , China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior / Q000523:psychology*; D001294:Attitude to Health; D032763:Behavior Control; D002648:Child; D002681:China; D005260:Female; D015438:Health Behavior; D006801:Humans; D033182:Intention; D008297:Male; D009043:Motor Activity; D012044:Regression Analysis; D020377:Self Efficacy; D011795:Surveys and Questionnaires
keywords: Adolescents; MVPA; TPB