3. In population genetics, a measure of the relative survival and reproductive success of a given individual or phenotype, or of a population subgroup.
4. A set of attributes, primarily respiratory and cardiovascular, relating to ability to perform tasks requiring expenditure of energy.
Farlex Partner Medical Dictionary © Farlex 2012
1. The state or condition of being fit; suitability or appropriateness.
2. Good health, especially good physical condition resulting from exercise and proper nutrition.
3. Biology The extent to which an organism is able to produce offspring in a particular environment.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
Health The ability or capacity to perform a particular task. See Aerobic fitness, Cardioivascular fitness, Physical fitness.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
3. population genetics A measure of the relative survival and reproductive success of a given individual or phenotype, or of a population subgroup.
4. A set of attributes, primarily respiratory and cardiovascular, relating to the ability to perform tasks requiring expenditures of energy.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
The ability to undertake sustained physical exertion without undue breathlessness. Fitness is associated with a sense of physical and mental well being. The achievement of fitness is possible only by making regular demands on the body to perform physical tasks. As fitness improves the bulk and strength of the voluntary muscles and the force and pumping efficiency of the heart muscle increase. The respiratory muscles perform more effectively. The subject is able to perform more work within the limits of the rate at which oxygen is supplied by the lungs and circulation (aerobic exercise). Recovery from fatigue is more rapid, a higher degree of muscle tension can be attained, the muscles are able to utilize glucose and fatty acids in the presence of less insulin, and the liver is better able to maintain the supply of glucose to the blood, and hence to the muscles, during strenuous exercise. The energy-producing elements in the muscle cells (the mitochondria) increase in size and number.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
the ability of an organism to transfer its genes to the next generation. Organisms favoured by SELECTION (natural or artificial) have a high fitness, while those subjected to adverse selection pressure have a low fitness. Thus, under conditions of insecticide treatment, resistant members of an insect population will have a high fitness and produce more offspring as compared to susceptible individuals that have a low fitness.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
Medical Dictionary for the Dental Professions © Farlex 2012
Patient discussion about fitness
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