What is the characteristic of a Long Run?

The characteristic of a long run is that it typically involves completing a sustained period of running for 1 to 2 hours. This duration is essential for building endurance and improving cardiovascular capacity, which are key goals for long-distance runners. Long runs help develop the muscles and mental stamina needed for longer races, allowing the body to adapt to the stress of prolonged physical activity.

In this context, the other options do not align with the definition of a long run. Option A suggests a duration that is much shorter than what is typically considered "long," while option B implies short bursts of speed, which is more characteristic of sprinting or interval training rather than a long, steady run. Lastly, option D focuses on recovery, which is not a defining characteristic of a long run itself; instead, recovery relates to the recuperation period following physical exertion. Thus, the correct characterization of a long run is indeed its completion within the 1 to 2 hour timeframe.