title: Information Seeking in Social Media: A Review of YouTube for Sedentary Behavior Content.
abstract: BACKGROUND
  The global prevalence of sedentary lifestyles is of grave concern for public health around the world. Moreover, the health risk of sedentary behaviors is of growing interest for researchers, clinicians, and the general public as evidence demonstrates that prolonged amounts of sedentary time increases risk for lifestyle-related diseases. There is a growing trend in the literature that reports how social media can facilitate knowledge sharing and collaboration. Social sites like YouTube facilitate the sharing of media content between users.
  
  
  OBJECTIVE
  The purpose of this project was to identify sedentary behavior content on YouTube and describe features of this content that may impact the effectiveness of YouTube for knowledge translation.
  
  
  METHODS
  YouTube was searched on a single day by 3 independent reviewers for evidence-based sedentary behavior content. Subjective data (eg, video purpose, source, and activity type portrayed) and objective data (eg, number of views, comments, shares, and length of the video) were collected from video.
  
  
  RESULTS
  In total, 106 videos met inclusion criteria. Videos were uploaded from 13 countries around the globe (ie, Australia, Barbados, Belgium, Canada, Colombia, Kenya, New Zealand, Russia, South Africa, Spain, Ukraine, United Kingdom, United States). The median video length was 3:00 minutes: interquartile range (IQR) 1:44-5:40. On average, videos had been on YouTube for 15.0 months (IQR 6.0-27.5) and had been viewed 239.0 times (IQR 44.5-917.5). Videos had remarkably low numbers of shares (median 0) and comments (median 1). Only 37.7% (40/106) of videos portrayed content on sedentary behaviors, while the remaining 66 videos portrayed physical activity or a mix of behaviors. Academic/health organizations (39.6%, 42/106) and individuals (38.7%, 41/106) were the most prevalent source of videos, and most videos (67.0%, 71/106) aimed to educate viewers about the topic.
  
  
  CONCLUSIONS
  This study explored sedentary behavior content available on YouTube. Findings demonstrate that there is confusion between physical activity and sedentary behaviors, that content is being uploaded to the site from around the globe, that content is primarily from health organizations and individuals with the purpose of educating fellow users, but that low views, comments, and shares suggest that sedentary behavior content is relatively underutilized on YouTube. Future research may wish to leverage social platforms, such as YouTube, to facilitate implementation and sharing of evidence-based sedentary behavior content.
authors.affiliation: University of Western Ontario, Health and Rehabilitation Sciences, London, ON, Canada. eknigh2@uwo.ca.
authors.forename: Emily
authors.identifier: http://orcid.org/0000-0001-7457-3336
authors.initials: E
authors.lastname: Knight
authors.forename: Brittany
authors.identifier: http://orcid.org/0000-0001-8475-988X
authors.initials: B
authors.lastname: Intzandt
authors.forename: Alicia
authors.identifier: http://orcid.org/0000-0001-8310-868X
authors.initials: A
authors.lastname: MacDougall
authors.forename: Travis J
authors.identifier: http://orcid.org/0000-0003-4227-415X
authors.initials: TJ
authors.lastname: Saunders
keywords: sedentary lifestyle; social media; translational medical research