In this book, the authors present current research in the study of health behaviour. Topics discussed include the role of fitness classes in the development of eating disorders among women; first year university female students' lifestyles and attitudes towards health risk and preventive measures; an examination of the extensive cross-sectional and longitudinal evidence that links traditional screen-time to paediatric obesity; gender issue implications on health; and health promotion messages used to inform the population about important health issues and to motivate individuals to adopt healthy behaviours and avoid unhealthy behaviours.