Electronic Word of Mouth on Twitter About Physical Activity in the United States: Exploratory Infodemiology Study

Ni Zhang   ¹ , MA, MPH, PhD ;   Shelly Campo   ² , PhD ;   Kathleen F Janz   ³ , EdD ;   Petya Eckler   ⁴ , PhD ;   Jingzhen Yang   ⁵ , MPH, PhD ;   Linda G Snetselaar   ⁶ , PhD ;   Alessio Signorini   ⁷ , M Comp Sc

¹ The University of Iowa alumnus, Iowa City, IA, United States

² The University of Iowa, Department of Community and Behavioral Health, Iowa City, IA, United States

³ The University of Iowa, Department of Health and Human Physiology, Iowa City, IA, United States

⁴ University of Strathclyde, School of Humanities, Glasgow, United Kingdom

⁵ Kent State University, Department of Social and Behavioral Sciences, Kent, OH, United States

⁶ The University of Iowa, Department of Epidemiology, Iowa City, IA, United States

⁷ The University of Iowa, Department of Computer Science, Iowa City, IA, United States