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Health, Nutrition & Fitness

Health isn't just about being able to impress people at the gym with your weight-lifting prowess. Physical fitness, the body's ability to function properly, and the absence of disease are important factors in determining health, as is one's emotional, mental, and social state. In addition, nutrition provides the energy that fuels all physical and mental activities, including the aforementioned displays of weight-lifting mastery.

Health, Nutrition & Fitness Encyclopedia Articles

Featured Articles

Nutrition
Nutrition, the assimilation by living organisms of food materials that enable them to grow, maintain themselves, and reproduce. Food serves multiple functions in most living organisms. For example, it provides materials that are metabolized to supply the energy required for the absorption and...
Encyclopedia / Health, Nutrition & Fitness
Vegetables are an important part of a balanced diet.
Human digestive system
Human digestive system, the system used in the human body for the process of digestion. The human digestive system consists primarily of the digestive tract, or the series of structures and organs through which food and liquids pass during their processing into forms absorbable into the...
Encyclopedia / Health, Nutrition & Fitness
The human digestive system as seen from the front.
Obesity
Obesity, excessive accumulation of body fat, usually caused by the consumption of more calories than the body can use. The excess calories are then stored as fat, or adipose tissue. Overweight, if moderate, is not necessarily obesity, particularly in muscular or large-boned individuals. Obesity was...
Encyclopedia / Health, Nutrition & Fitness
obesity
Disease
Disease, any harmful deviation from the normal structural or functional state of an organism, generally associated with certain signs and symptoms and differing in nature from physical injury. A diseased organism commonly exhibits signs or symptoms indicative of its abnormal state. Thus, the normal...
Encyclopedia / Health, Nutrition & Fitness
Haiti earthquake of 2010: cholera
Metabolism
Metabolism, the sum of the chemical reactions that take place within each cell of a living organism and that provide energy for vital processes and for synthesizing new organic material. Living organisms are unique in that they can extract energy from their environments and use it to carry out...
Encyclopedia / Health, Nutrition & Fitness
mitochondria and cellular respiration
Vitamin
Vitamin, any of several organic substances that are necessary in small quantities for normal health and growth in higher forms of animal life. Vitamins are distinct in several ways from other biologically important compounds such as proteins, carbohydrates, and lipids. Although these latter...
Encyclopedia / Health, Nutrition & Fitness
vitamin E
Human nutrition
Human nutrition, process by which substances in food are transformed into body tissues and provide energy for the full range of physical and mental activities that make up human life. The study of human nutrition is interdisciplinary in character, involving not only physiology, biochemistry, and...
Encyclopedia / Health, Nutrition & Fitness
MyPlate dietary guidelines from the U.S. Department of Agriculture
Physical culture
Physical culture, philosophy, regimen, or lifestyle seeking maximum physical development through such means as weight (resistance) training, diet, aerobic activity, athletic competition, and mental discipline. Specific benefits include improvements in health, appearance, strength, endurance,...
Encyclopedia / Health, Nutrition & Fitness
Young Men's Christian Association (YMCA) gymnasium, Longacre, London, wood engraving, c. 1888. Opened by the Prince of Wales on June 16, 1888.
Exercise
Exercise, the training of the body to improve its function and enhance its fitness. The terms exercise and physical activity are often used interchangeably, but this article will distinguish between them. Physical activity is an inclusive term that refers to any expenditure of energy brought about...
Encyclopedia / Health, Nutrition & Fitness
Carbohydrate
Carbohydrate, class of naturally occurring compounds and derivatives formed from them. In the early part of the 19th century, substances such as wood, starch, and linen were found to be composed mainly of molecules containing atoms of carbon (C), hydrogen (H), and oxygen (O) and to have the general...
Encyclopedia / Health, Nutrition & Fitness
Pathways for the utilization of carbohydrates.
Public health
Public health, the art and science of preventing disease, prolonging life, and promoting physical and mental health, sanitation, personal hygiene, control of infectious diseases, and organization of health services. From the normal human interactions involved in dealing with the many problems of...
Encyclopedia / Health, Nutrition & Fitness
polio vaccine
Mental hygiene
Mental hygiene, the science of maintaining mental health and preventing the development of psychosis, neurosis, or other mental disorders. Since the founding of the United Nations the concepts of mental health and hygiene have achieved international acceptance. As defined in the 1946 constitution...
Encyclopedia / Health, Nutrition & Fitness
Dorothea Dix, portrait by S.B. Waugh, 1868; in Saint Elizabeths Hospital, Washington, D.C.

Health, Nutrition & Fitness Encyclopedia Articles

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