This is an very interesting question which I do ask myself from time to time. Do I go into a 'robot mode' and just switch off everything or do I let some thoughts invade into the idyllic zonal spaceout state of mind which sometimes freaks me out at the sheer clarity of thought ? The 'Aha moment' which only comes when I am is truly at peace with myself and shut out everything ?
The answer is a bit of both. To be frank, when I set out, I actually zone out and focus on 2 aspects of my self.
a) My breathing.
I usually start out the run by concentrating on my breathing ensuring that each breath is measured and I am amazed by the fresh air I can actually intake. I breathe deeply to the extent that my lungs ache. Which is a good thing, in my opinion. We, so often, take for granted our ability to do the simple task of breathing that when you focus on it, you actually appreciate the one of 3 organs which fundamentally keeps us alive (the other 2 being the heart and brain).
b) My legs.
I have always had strong and stiff legs. They have been both my boon and my bane. They were and still are very strong. I always thought I had iron legs. In my teenage years, my swim club mates called be "Stiff Austin" (a joke about the 6 Million Dollar Man Steve Austin who had bionic lags haha) because well my legs were really stiff and hard. I recall playing football in the courtyard of the Club way back in the mid 70s and I didn't wear shoes.
So one time, I recall, I kicked hard at the rubber ball at the goal, and MISSED. Instead, my leg kicked the huge exposed root of the 160 year old tree. The bark of the tree actually came off and my leg though sore, was still intact.
Thats how strong my legs were !
After the first 2 things are settled, I will just go into a Zen Like Zone and run without paying much attention to my surroundings. However, as the kms go by my mind will start to wander and normally things so random will just pop into the mindfulness zone.
Here is one such thought. I dreamt up a decision tree process while I was running. Only today 10th July have I had the courage to write it down.
Please take a look at my innermost thoughts when I run.
In a nutshell, running on a Saturday leaves me happy, and ecstatic. So I will run based on my decision tree logic as shown above.