title: The adoption and spread of a core-strengthening exercise through an online social network.
abstract: BACKGROUND
  The present feasibility study describes engagement and spread of a Twitter-based core-strengthening challenge.
  
  
  METHODS
  A challenge that entailed completing a core-strengthening exercise using a hashtag (#PlankADay) was circulated via Twitter. This study surveyed users who joined during the first 2 months of the challenge to describe their characteristics, including social support for exercise and to what extent they invited others to join. The study continued to track total users for 10 months.
  
  
  RESULTS
  Of 407 individuals who joined in the first 2 months, 105 completed surveys. Among these, 81% were female and 86% white and mean age was 35.8. 72% participated for at least 1 month and 47% participated for at least 2 months. Survey participants reported that the challenge increased their enjoyment of abdominal exercise. Of the 68% of participants who invited others to participate, 28% recruited none, 66% recruited 1-5 users, and 6% recruited 10 or more users. Participants reported that online friends provided as much positive social support for exercise as family and in-person friends. In 14 months, 4941 users produced 76,746 tweets and mean total tweets per user was 15.86 (SD = 75.34; range = 1-2888).
  
  
  CONCLUSIONS
  Online social networks may be a promising mechanism to spread brief exercise behaviors.
authors: Dept of Medicine, University of Massachusetts Medical School, Worcester, MA.
authors: Sherry L
authors: SL
authors: Pagoto
authors: Kristin L
authors: KL
authors: Schneider
authors: Jessica
authors: J
authors: Oleski
authors: Brian
authors: B
authors: Smith
authors: Michael
authors: M
authors: Bauman
mesh_terms: D000293:Adolescent; D000328:Adult; D015444:Exercise; D005240:Feasibility Studies; D005260:Female; D006240:Happiness; D015438:Health Behavior; D006306:Health Surveys; D006801:Humans; D020407:Internet; D008297:Male; D008875:Middle Aged; D009042:Motivation; D009043:Motor Activity; D060756:Social Networking; D012944:Social Support; D012959:Socioeconomic Factors; D055815:Young Adult