Tuija Tammelin is a researcher of LIKES Research Centre for Physical Activity and Health and served as the department director. She is a visiting professor of Faculty of Sport and Health Sciences at the University of Jyvaskyla, a senior advisor of the Finland Sports Science Society and a member of the European Sports Science Society. Her research interests include physical activity and fitness among youth and young adults, epidemiology of physical activity and fitness, exercise physiology, and measurement of physical activity. She has published more than 110 papers and completed several research projects in physical activity and health promotion.