Endurance sports are physical activities that require sustained effort over an extended period. These sports often involve aerobic exercises, where the body relies on oxygen to fuel muscles. Common examples include marathon running, cycling, and triathlons. Participants typically train for long durations to build stamina and improve their performance. Athletes in endurance sports often focus on developing their cardiovascular fitness and muscular endurance. Training may include long-distance runs, interval workouts, and cross-training activities. Nutrition and hydration are also crucial, as they help maintain energy levels during prolonged exertion.