Being healthy is much desired by all people.Disease and ill-health are not only "harvest by chance"-many of the determinants of health are well known.We know from research that ill-health as well as the majority of chronic or long standing diseases are related to unhealthy lifestyle eg smoking, wrong diet, physical inactivity Today we refer to these conditions as -"welfare or lifestyle diseases.people learn from behavior and habits rather than those being innate and these behavior and habits can be affected by one's own strength and also be replaced by other more health supporting ones.However it is not as simple as it sounds to change one's style because it is commonly grounded in structural condition.To change lifestyle it is necessary to acquire more knowledge and enhance one's awareness of the relationship between lifestyle and health.The book presents research based knowledge about the relationships between different aspects of lifestyles and health.