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Sherry L. Pagoto, Kristin L. Schneider, Jessica Oleski, Brian Smith and Michael Bauman


The present feasibility study describes engagement and spread of a Twitter-based core-strengthening challenge.


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.


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).


Online social networks may be a promising mechanism to spread brief exercise behaviors.

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:// Social Comparison in Online Social Networks: The Effects on Exercise Class Attendance Online social networks may influence behavior through a variety of mechanisms. The authors of this study evaluated the effects of online social support and social comparison on exercise class attendance. A double

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Sarah Edney, Tim Olds, Jillian Ryan, Ronald Plotnikoff, Corneel Vandelanotte, Rachel Curtis and Carol Maher

performed within peer groups. 55 , 64 Baseline similarities in weight and PA status may positively influence behavior change throughout an intervention. For example, a recent online social networking website providing support for achieving weight loss found that the likelihood of a person losing weight

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Jocelyn Kernot, Lucy Lewis, Tim Olds and Carol Maher

giving adults a pedometer to monitor steps can assist with increasing physical activity. 27 – 29 It was hypothesized that the online social networking aspects of the MSIU app would be more effective than a traditional pedometer intervention. To test this hypothesis, a second intervention condition was

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Nicole M.S. Belanger and Julie Hicks Patrick

RF , Zimmer C , Ammerman AS . The role of companionship, esteem, and informational support in explaining physical activity among young women in an online social network intervention . J Behav Med . 2014 ; 37 ( 5 ): 955 – 966 . PubMed doi:10.1007/s10865-013-9534-5 10.1007/s10865-013-9534-5 23

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Mitali S. Thanawala, Juned Siddique, John A. Schneider, Alka M. Kanaya, Andrew J. Cooper, Swapna S. Dave, Nicola Lancki and Namratha R. Kandula

consideration when trying to design interventions to increase physical activity. Our results provide empirical evidence of links between interpersonal social environment and physical activity among South Asians in the United States. Although there is a large and growing literature about online social networks

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Ariane Bélanger-Gravel, Marilie Laferté, Frédéric Therrien, François Lagarde and Lise Gauvin

expected because WIXX ads were mainly broadcasted on French-language media. WIXX mobile apps were designed in French, and the online social networks content was mostly posted in French. Differences observed in boys’ awareness might suggest some potential communication inequalities within this segment. 37

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Emma E. Sypes, Genevieve Newton and Zakkoyya H. Lewis

Endocrinol . 2016 ; 4 ( 12 ): 983 – 995 . PubMed ID: 27717766 doi:10.1016/S2213-8587(16)30284-4 27717766 10.1016/S2213-8587(16)30284-4 19. Greene J , Sacks R , Piniewski B , Kil D , Hahn JS . The impact of an online social network with wireless monitoring devices on physical activity and

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Martyn Rothwell, Joseph Stone and Keith Davids

learning and formal learning influenced views and attitudes towards learning, practicing, and developing in rugby league. Informal Learning The analysis revealed that coaches valued informal learning experiences (i.e., watching other coaches and online social networks) during their early development phases

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David A. Ferrer and Rebecca Ellis

-003926 28. Maher CA , Lewis LK , Ferrar K , Marshall S , De Bourdeaudhuij I , Vandelanotte C. Are health behavior change interventions that use online social networks effective? A systematic review . J Med Internet Res . 2014 ; 16 ( 2 ): e40 doi:10.2196/jmir.2952 10.2196/jmir.2952