Final answer:
Physical exercise, or physical activity, is any bodily movement that enhances physical fitness and overall health. It can include aerobic exercise and strength training.
Step-by-step explanation:
Physical exercise, also known as physical activity, refers to any bodily movement that enhances or maintains physical fitness and overall health. It can include activities such as walking, cycling, household chores, or even playing active games. Aerobic exercise is a type of physical activity that uses muscles at less than their maximum contraction strength but for long periods of time, such as cycling or brisk walking. Strength training, on the other hand, focuses on building muscular strength through activities like weightlifting or resistance training.