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Health – level of functional and (or) metabolic efficiency of a person in mind, body and spirit; being free from illness, injury or pain (as in “good health” or “healthy”).[1] The World Health Organization (WHO) defined health in its broader sense in 1946 as "a state of complete physical, mental, and social well-being and not merely the absence of disease or infirmity."[2][3]

  • Exercise – any bodily activity that enhances or maintains physical fitness and overall health and wellness. It is performed for various reasons including strengthening muscles and the cardiovascular system, honing athletic skills, weight loss or maintenance, and mental health including the prevention of depression. Frequent and regular physical exercise boosts the immune system, and helps prevent the "diseases of affluence" such as heart disease, cardiovascular disease, Type 2 diabetes and obesity.[4][5]
  • Health science
    • Medicine – science and art of healing. It encompasses a variety of health care practices evolved to maintain and restore health by the prevention and treatment of illness.
      • Dentistry – branch of medicine that is involved in the study, diagnosis, prevention, and treatment of diseases, disorders and conditions of the mouth, maxillofacial area and the adjacent and associated structures (teeth) and their impact on the human body.[6]
    • Life extension – The study of slowing down or reversing the processes of aging to extend both the maximum and average lifespan.
    • Nutrition – provision, to cells and organisms, of the materials necessary (in the form of food) to support life. Many common health problems can be prevented or alleviated through good nutrition.
References
  1. Merriam-Webster. Dictionnary - "Health", accessed 21 April 2011.
  2. World Health Organization. 1946. WHO definition of Health, Preamble to the Constitution of the World Health Organization as adopted by the International Health Conference, New York, 19–22 June 1946; signed on 22 July 1946 by the representatives of 61 States (Official Records of the World Health Organization, no. 2, p. 100) and entered into force on 7 April 1948.
  3. World Health Organization. 2006. Constitution of the World Health Organization - Basic Documents, Forty-fifth edition, Supplement, October 2006.
  4. doi:10.1056/NEJM200007063430103
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  5. Hu., F., Manson, J., Stampfer, M., Graham, C., et al. (2001). Diet, lifestyle, and the risk of type 2 diabetes mellitus in women. The New England Journal of Medicine, 345(11), 790–797. Retrieved October 5, 2006, from ProQuest database.
  6. Dentistry Definitions, hosted on the American Dental Association website. Page accessed 30 May 2010. This definition was adopted the association's House of Delegates in 1997.