According to the World Health Organization (WHO), health is a state of total physical, mental, and social well-being, free of disease, injury, or infirmity. The most important step in promoting health is to encourage activities that promote health and reduce unhealthy ones. The definition of healthy living must accommodate these environmental differences. For example, a person who lives at sea level can experience shortness of breath and anemia if he or she has to shovel snow in the mountains.

The medical model of health defines health as the absence of disease. The biopsychosocial model combines social, emotional, and physiological aspects of illness. In addition to being unrealistic, this view of health is based on the notion that few people will ever reach ‘complete health’. This approach also fails to consider the fact that a number of people may develop chronic illnesses and disabilities in their lifetimes. The concept of ‘complete health’ is not only unrealistic, but it contributes to the over-medicating of society.

The third definition of health cannot simply stop at eradicating diseases and reducing risk factors. It must involve the individual and address scales of value. This definition of health is largely based on the belief that ‘complete health’ is the best way to achieve total wellness. It fails to take into account the realities of everyday life, which include the fact that many people have chronic illnesses and disabilities. It is also inaccurate and contributes to the medicalization of society.

A ‘complete health’ model of health is also problematic. It assumes that everyone is completely healthy and in perfect physical and mental condition. This is not only unrealistic, but also counterproductive and fails to take into account the fact that most of us will never achieve a state of ‘complete health’. Furthermore, this model of health fails to account for the reality of chronic diseases and disabilities, and contributes to the over-medicalisation of society.

Health science includes research, study of human health and illness and the application of that knowledge to improve health. It encompasses the prevention and treatment of diseases and the promotion of good health. These sciences can be broadly divided into different areas: sociology, biomedical engineering, and even the study of spiritual health. All of these fields have their own definitions, but they are all related to promoting good health. For example, spiritual and emotional health is essential for physical health.

The biopsychosocial model is a more comprehensive view of health. In this model, health is defined as a state of well-being in which there is no illness or disease. The biopsychosocial model considers all aspects of health and its relationship to others. This approach also integrates the various types of knowledge into the definition of a healthy person. If these three models are more accurate, then health is a state of complete well-being.