Ten kilometers is the golden distance for regular running. First, the optimal duration for exercise that benefits health is 40-60 minutes, which is just the right time to complete ten kilometers; second, ten kilometers can greatly enhance a runner's psychological quality and self-confidence; third, ten kilometers is enough to generate a sense of pleasure; fourth, to run ten kilometers in one go requires not only endurance but also sufficient vital energy and blood. Regularly running ten kilometers can nourish vital energy and blood.