A participant's skill level will eventually deteriorate due to loss of physical ability from ageing. Thus, in a sport, people of all different ages compete at a variety of levels and improve over time until their performance peaks and then declines. A sport cannot be dominated by a teenager for more than brief moments in time. Thus, tennis is not a sport. To facilitate competition and the development of the competitors' skill levels, each sport has one or more regulatory organizations or ruling bodies.
Sports always have a professional level even when the participants are called amateurs.
Thus, track and field is a sport. The ultimate goal of any sport is to win, not drink beer. Thus, men's softball is not a sport and women's softball is a sport. Sports may use implements and tools but may not include automated devices or animals other than humans. Thus, auto racing and horse racing are not sports.