title: Public health guidelines for physical activity: is there an app for that? A review of android and apple app stores.
abstract: BACKGROUND
  Physical activity participation is an important behavior for modifying lifestyle-related disease risk. Mobile health apps for chronic disease management and prevention are being developed at a rapid rate. However, it is unclear whether these apps are evidence-based. Current public health recommendations for physical activity participation for adults highlight the importance of engaging in 150 minutes weekly of purposeful exercise, and muscle strengthening activities on at least 2 days of the week.
  
  
  OBJECTIVE
  The aims of the present review were to (1) identify available evidence-based physical activity apps, and (2) identify technological features that could be leveraged to improve health outcomes.
  
  
  METHODS
  iTunes and Google Play mobile app stores were searched using keyword and category searching during a single day (February 18, 2014) for physical activity apps available in English. The description pages of eligible apps were reviewed by 4 independent reviewers for evidence-based content, technological, and descriptive features. An a priori subset of apps was downloaded for further review (n=6 affiliated with a non-commercial agency; n=10 top rated; n=10 random selection), and developers were contacted for information regarding evidence-informed content.
  
  
  RESULTS
  The initial search yielded 2400 apps, of which 379 apps (n=206 iTunes; n=173 Google Play) were eligible. Primary results demonstrated no apps (n=0) adhering to evidence-based guidelines for aerobic physical activity, and 7 out of 379 implementing evidence-based guidelines for resistance training physical activity. Technological features of apps included social networking (n=207), pairing with a peripheral health device (n=61), and measuring additional health parameters (n=139). Secondary results revealed 1 app that referenced physical activity guidelines (150 minutes/weekly of exercise), and demonstrated that apps were based on various physical activity reports (n=4) or personal expertise (n=2).
  
  
  CONCLUSIONS
  The present study demonstrated a shortage of evidence-based physical activity apps. This gap underscores the need for development of evidence-informed mobile apps. Results highlight the opportunity to develop evidence-informed mobile apps that can be used clinically to enhance health outcomes.
authors.affiliation: University of Western Ontario, Faculty of Health Sciences, London, ON, Canada.
authors.forename: Emily
authors.identifier: http://orcid.org/0000-0001-7457-3336
authors.initials: E
authors.lastname: Knight
authors.forename: Melanie I
authors.identifier: http://orcid.org/0000-0003-3478-1469
authors.initials: MI
authors.lastname: Stuckey
authors.forename: Harry
authors.identifier: http://orcid.org/0000-0003-0636-7316
authors.initials: H
authors.lastname: Prapavessis
authors.forename: Robert J
authors.identifier: http://orcid.org/0000-0002-4224-1916
authors.initials: RJ
authors.lastname: Petrella
keywords: Exercise; Mobile applications; Public Health