Children Learn, Children Do! Results of the “Planning Health in School”, a Behavioural Change Programme

The ‘Planning Health in School’ programme (PHS-pro) is a behavioural change intervention to assess and improve the eating habits of children, particularly the intake of fruit and vegetables, and to guide them towards healthy choices. The programme and its educational components are based on the Transtheoretical Model of stages of change to integrate nutritional literacy and build up problem-solving and decision-making skills. Children (n = 240, ages 10–12) of one large suburban school in Porto’s metropolitan area (Portugal) were evaluated throughout PHS-pro implementation during one school year in a repeated time–series design. Children’s outcome evaluations were conducted through seven 3-day food records for nine eating behaviour, documented after each learning module and through participatory activities which analysed attitudes, preferences and expectations. Changes were observed in children’s eating behaviour, supported by changes in motivation as perceived in their attitudes and expectations. Significant changes were found in a higher consumption of vegetable soup (p = 0.003), milk products (p = 0.024), and fruit (p = 0.008), while the consumption of high-energy dense food (p = 0.048) and soft drinks (p = 0.042) significantly decreased. No positive effects on fried food, water, vegetables and bread consumption were found. The PHS-pro intervention proved to be effective in developing healthy eating behaviour in young people.