What type of training program focuses on improving endurance for long-distance running?

Aerobic training is specifically designed to enhance endurance, which is crucial for long-distance running. This type of training emphasizes the ability of the cardiovascular and respiratory systems to supply oxygen to the muscles over extended periods. Long-distance running requires continuous, rhythmic activity where the body relies on oxygen for energy, making aerobic conditioning essential.

In contrast, strength training primarily focuses on building muscle mass and increasing the strength of muscles, which does not directly improve cardiovascular endurance necessary for long-distance events. Power training aims at explosive movements and is more suited for short bursts of activity rather than endurance over a prolonged duration. Agility training enhances quick, dynamic movements and coordination but does not specifically target the aerobic capacity needed for endurance sports. Thus, aerobic training is the most appropriate choice for improving endurance for long-distance running.