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Exercise is physical activity done regularly to improve, maintain, or slow the loss of fitness. Physical fitness is the capacity to perform physical activities with vigor and alertness and without undue fatigue. Fit people have more energy to pursue leisure activities. Fitness is also the degree to which people can withstand stress and persevere under difficult or emergency circumstances. Regular exercise is one of the best things that people can do to help prevent illness, preserve health and longevity, and enhance quality of life. Exercise comes in many forms and can vary in intensity of effort. With so many ways to exercise, almost everyone can participate in some way.
Last full review/revision September 2007 by Brian D. Johnston
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