Psychosocial correlates of objectively measured physical activity in children

Background: A large proportion of UK children do not reach the recommended levels of physical activity (PA) required for optimum health. Few studies have investigated the psychosocial correlates of object-ively measured PA in preadolescents. This study examined child attitudes and parental behaviours as correlates of children’s activity. Methods: In total, 278 children (138 boys and 140 girls) aged 7–9 years were recruited as part of the Physical Exercise and Appetite in Children Study (PEACHES). Activity was objectively measured using the Actigraph GT1M accelerometer; the variables were total PA (mean accelerometer countsmin1) and moderate and vigorous PA (MVPA)>2000 countsmin1. Child-focussed variables were self-efficacy (Physical Activity Self-Efficacy scale), physical performance self-concept (Self-Perception Profile for Children), positive and negative outcome expectancies and liking for PA. Parental variables were PA and support for child activity. Results: Significant sex-by-psychosocial outcome interactions were observed for total PA and MVPA, so data from boys and girls were analysed separately. No psychosocial or parental outcomes were correlated with activity in girls. Significant correlates of activity in boys (self-efficacy, self-concept and parental support) were entered in to a hierarchical regression using both total PA and MVPA and, controlling for BMI SD, SES and ethnicity. PA self-efficacy and self-concept were significantly independently associated with tota