Which factor is most closely associated with long-distance athletic potential?

The factor most closely associated with long-distance athletic potential is the anaerobic threshold. This threshold refers to the point during intense exercise at which the body transitions from aerobic energy production to anaerobic energy production. In endurance sports, an athlete's ability to sustain a high level of performance over long distances is heavily influenced by their anaerobic threshold.

When athletes train to improve their anaerobic threshold, they are effectively increasing their capacity to perform at higher intensities without accumulating excessive lactic acid, which can lead to fatigue. A higher anaerobic threshold allows long-distance runners and other endurance athletes to maintain a faster pace for a longer period.

Improved anaerobic capacity can lead to better race performance, allowing athletes to push their limits while minimizing fatigue. While factors such as maximal power, aerobic threshold, and flexibility contribute to overall athletic performance, the anaerobic threshold plays a central role in endurance events, making it the key factor for long-distance athletic potential.