Base-building is a training approach focused on developing a strong foundation of endurance and aerobic capacity. It typically involves longer, slower workouts that help improve cardiovascular fitness and stamina. This phase is essential for athletes, especially in endurance sports like running, cycling, or triathlon, as it prepares the body for more intense training later on. During base-building, athletes often engage in consistent, low-intensity exercise, allowing their bodies to adapt and recover. This method helps to enhance overall performance and reduces the risk of injury. By prioritizing base-building, athletes can build the necessary strength and endurance to tackle more challenging workouts in the future.