An athletic activity is any physical activity that requires physical exertion and skill, and is usually competitive in nature. The two most common examples of athletic activities are sports and agility. Sports involve teams or individuals competing against each other in a variety of physical activities, such as running, jumping, throwing, and swimming. Agility involves performing physical activities that require quick reflexes, coordination, and balance, such as obstacle courses, rope climbing, and jumping. Both sports and agility require physical strength, endurance, and skill to be successful.