The most basic difference between amateur athletic events and professional events lies in their rewards for participation. Amateur events, by definition, do not reward victors with a prize of great value. Professional events, by contrast, reward participants and victors with money or other prizes. An accomplished athlete may choose to compete as an amateur if her sport does not have a thriving professional organization. Some athletes can make a living in amateur sports because victories in high-profile amateur events can lead to advertising deals and other business opportunities.
Restricted competition includes elementary school, high school, and college athletics.
Sports on these levels are controlled by athletic conferences, associations, and leagues connected to high schools and colleges. Athletes in restricted competition must be eligible to play. Eligibility is determined by conferences, associations, and leagues formed by the schools. Unrestricted competition is open to all amateur athletes, with some qualifications. The Olympics is an example of unrestricted competition.