Professional athletes are individuals who compete in sports at a high level and earn a living from their athletic abilities. They often participate in organized competitions, such as Olympic Games, professional leagues, or international tournaments. These athletes train rigorously to improve their skills, strength, and endurance, often dedicating many hours each day to practice. To become a professional athlete, individuals typically start training at a young age and may join local teams or clubs. Success in sports can lead to sponsorships, endorsements, and significant financial rewards. Popular professional athletes include figures like LeBron James in basketball and Serena Williams in tennis.