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Exercise What is exercise? The actual definition of exercise is; to use repeatedly in order to strengthen or develop, but to make it simpler, exercise is doing programs and workouts to keep fit, for example, running, hiking, bicycling, and any active sport. Most Americans do little or no exercise during work or rest hours. Today there aren’t many jobs requiring intense physical activity. Instead of walking, people use automobiles or public transportation. Instead of being physically active, people usually watch TV in their free time. Some sports such as bowling, golf, and tennis (doubles) provide some exercise, but do not provide as much exercise as other more vigorous sports. Exercise is very important and is beneficial both physically and mentally. When you exercise, you feel be