"Endurance running" typically refers to long-distance training and racing events that test a runner's stamina and physical resilience. It involves running distances such as 5K, 10K, marathons, and beyond, focusing on building aerobic capacity and muscle strength. Endurance runners train to maintain a steady pace over extended periods, developing mental toughness and a high level of fitness. This sport encompasses various competitive settings, including road races, trails, and even ultra-marathons, and is popular among athletes who seek to challenge their limits.