Pressick and co-workers systematic review, on research into the effectiveness of group-based sport and exercise programs designed for indigenous adults in Australia, supports the design of programs that incorporate both nutrition and sport or exercise components as being effective in producing positive intermediate term health outcomes. In other articles in this month's physical activity section, Brusseau, Burns and Fu suggest that US adolescent physical activity levels during middle school years are seasonally highest in outdoor activity in autumn, having implications for seasonal programming of interventions. Salnave's group suggest that blood pressure and television viewing exposure do not directly correlate, with future research needing to consider gender, BMI and age in project construction. Jones and colleague's translational trial promoting gross motor skills in childcare environments suggests that more work needs to be done in evaluating educator led physical activity interventions in this group. In the final paper in this section, Jaakkola and co-workers, show that self perception of motor ability during early puberty influences subsequent physical activity behaviours.