How can children, adolescents and adults who are overweight or obese be motivated to participate in health programs?

The World Health Organization (WHO) sees obesity as one of the greatest challenges for public health in the 21st century. The Austrian Institute for Health Technology Assessment (AIHTA) has now examined group programs offered in Austria, Germany, and Switzerland for children, adolescents, and adults with either overweight or grade 1 obesity, as well as numerous international literature sources.