Exercise is physical activity that is planned, structured, and repetitive to condition the body. Exercise is used to improve health, maintain fitness and for physical rehabilitation. It is used to prevent or treat heart disease, osteoporosis, weakness, diabetes, obesity, and depression. Range of motion exercise increases or maintains joint function. Strengthening exercises provide appropriate resistance to the muscles to increase endurance and strength. Cardiac rehabilitation exercises improve the cardiovascular system to prevent and rehabilitate heart disorders and diseases. A well-balanced exercise program can improve general health, build endurance, delay many aging effects, and enhance emotional well-being. Before beginning any exercise program, evaluation by a physician is recommended. Some exercise programs should be supervised by a health care professional, especially if used for rehabilitation. If symptoms of dizziness, nausea, excessive shortness of breath, or chest pain are present while exercising, stop the activity and inform the physician.

Range of...