What fosters a 'healthy' lifestyle? How much responsibility does the individual have for his or her own health? Which is more significant: the social circumstances in which people live, or lifestyle habits such as excercise or smoking? Is health really 'worse' in the north than in the south, and how unequal are the social classes? For the first time it is possible to attempt to answer some of these questions, based on a national survey which was conducted by an interdisciplinary team at the University of Cambridge Clinical School. Health and Lifestyles examines the findings, and considers such issues as measured fitness, declared health, psychological status, life circumstances, health-related behaviour, attitudes, and beliefs. Interesting conclusions are presented. Social circumstances, for example, are more important than lifestyle habits. Moreover, lifestyle may have more effect among the more privileged, than the disadvantaged.