title: Using Mobile Apps to Promote a Healthy Lifestyle Among Adolescents and Students: A Review of the Theoretical Basis and Lessons Learned.
abstract: BACKGROUND
  European adolescents and students tend to have low levels of physical activity and eat unhealthy foods, and the prevalence of overweight and obesity has increased, which poses a public health challenge. Mobile apps play an important role in their daily lives, suggesting their potential to be used in health-promoting strategies.
  
  
  OBJECTIVE
  This review aimed to explore how mobile apps can contribute to the promotion of healthy nutrition, physical activity, and prevention of overweight in adolescents and students. For the apps identified, the review describes the content, the theoretical mechanisms applied, and lessons learned.
  
  
  METHODS
  The databases Scopus, MEDLINE, Embase, and PsycINFO were searched for English-language publications from January 2009 to November 2013. Studies were included if (1) the primary component of the intervention involves an app; (2) the intervention targets healthy nutrition, or physical activity, or overweight prevention; and (3) the target group included adolescents or students (aged 12-25 years).
  
  
  RESULTS
  A total of 15 studies were included, which describe 12 unique apps. Ten of these apps functioned as monitoring tools for assessing dietary intake or physical activity levels. The other apps used a Web-based platform to challenge users to exercise and to allow users to list and photograph their problem foods. For 5 apps, the behavioral theory underpinning their development was clearly specified. Frequently applied behavior change techniques are prompting self-monitoring of behavior and providing feedback on performance. Apps can function self-contained, but most of them are used as part of therapy or to strengthen school programs. From the age of 10 years users may be capable of using apps. Only 4 apps were developed specifically for adolescents. All apps were tested on a small scale and for a short period.
  
  
  CONCLUSIONS
  Despite large potential and abundant usage by young people, limited research is available on apps and health promotion for adolescents. Apps seem to be a promising health promotion strategy as a monitoring tool. Apps can enable users to set targets, enhance self-monitoring, and increase awareness. Three apps incorporated social features, making them "social media," but hardly any evidence appeared available about their potential.
authors.affiliation: National Institute for Public Health and Environment (RIVM), Bilthoven, Netherlands.
authors.forename: Denise Jantine
authors.identifier: http://orcid.org/0000-0003-1230-344X
authors.initials: DJ
authors.lastname: Dute
authors.forename: Wanda Jose Erika
authors.identifier: http://orcid.org/0000-0001-5270-3494
authors.initials: WJ
authors.lastname: Bemelmans
authors.forename: João
authors.identifier: http://orcid.org/0000-0002-8177-4926
authors.initials: J
authors.lastname: Breda
keywords: adolescents and students; behavior change; health promotion; mHealth; mobile phones; nutrition; overweight; physical activity