Are you an associative runner or a disassociative runner? Actually, the associative/disassociative designation applies to any form of exercise -- running, strength training, yoga, pilates, etc. Basically the question is asking whether you use some form of background noise/thoughts to get you through the workout. Associative runners don't use headphones or MP3 players during their treks. They try and focus on the rhythm and pace of the run, drawing the mind back each time it wanders. Disassociative runners let the mind wander. They day dream, listen to music, sing, etc.
Conventional wisdom says that people who try and disassociate from a workout are trying to prevent boredom and are first and foremost trying to "get through" the workout. The concern is that in disassociating you are trying to separate the mind from the body and are losing a vital connection that is key to peak performance. It is harder to acheive a "flow" state through disassociating. Movement practices like yoga emphasize the connection of the mind to the body, and most runners who are associative talk about the high they get but laying all thoughts aside during the run and jut getting into the pace of the movement.
Not being a runner by nature, I listen to music depending on the type of workout I am doing. Power yoga and aikido are without music, but with a typical strength training routine I blast hard rock into my ears. It psyches me up. A little head banging is good for moving heavy iron and seems to get the adreneline pumping before a heavy set of deadlifts or squats.
