Effectiveness of a Web-based Intervention Aimed at Healthy Dietary and Physical Activity Behavior: A Randomized Controlled Trial About Users and Usage

Saskia M. Kelders   ^{1, 2 †} , MSc ;   Julia E.W.C. Van Gemert-Pijnen   ^{2 †} , PhD ;   Andrea Werkman   ^{3 †} , PhD ;   Nicol Nijland   ^{2 †} , PhD ;   Erwin R. Seydel   ^{2 †} , PhD

¹ National Institute for Public Health and the Environment, Bilthoven, Netherlands

² Department of Psychology, Health and Technology, Faculty of Behavioural Sciences, University of Twente, Enschede, Netherlands

³ Netherlands Nutrition Centre, Den Haag, Netherlands