The application field of the Leipzig Lifestyle Questionnaire for Young People (LLfJ) ranges from general health education and health promotion measures to specific prevention, intervention and counseling measures for 14 to 18 year olds. The LLfJ records the youthful lifestyle with regard to leisure time orientations, peer group integration, motivations for leisure time activities, food consumption and nutritional knowledge. In addition to the detailed theoretical and test statistical description, the manual contains an advisory section and case studies on lifestyle-based advice.