2×10K

2x10K refers to a specific type of race or challenge that involves completing two separate 10-kilometer (10K) running courses. This format is often used in athletic events, particularly in triathlons or duathlons, where it might be part of a larger competition or a standalone event. The "2x10K" designation clearly indicates the distance of each segment and the number of repetitions required.

In the context of a triathlon, a 2x10K might appear as a run-bike-run format, where athletes complete a 10K run, followed by a cycling leg, and then another 10K run. Alternatively, in some duathlon formats, it could mean two distinct 10K running legs separated by a cycling portion. The total distance for the running portions in such an event would be 20 kilometers.

The challenge of a 2x10K race lies not only in covering the total distance but also in managing the transition between disciplines or segments. Athletes need to maintain a consistent pace and energy level throughout both running stages, considering the fatigue that may set in after the first 10K or the preceding cycling leg. Training for such an event typically involves endurance running and practicing transitions to optimize performance. The specific rules and format can vary depending on the organizing body and the event itself.