Final answer:
Physical exercise is any bodily activity that enhances physical fitness and overall health. Exercise involves frequency, duration, intensity, and structure.
Step-by-step explanation:
Physical exercise is defined as any bodily activity that enhances or maintains physical fitness and overall health. It includes activities like walking, swimming, and household or yard work. On the other hand, exercise refers to a pattern of physical activity that involves frequency, duration, intensity, and structure. Exercise can be classified into three types: aerobic, anaerobic, and flexibility exercises.