I agree 100% with this article - I do my best thinking when walking. It is the combination of light exercise that gets the blood moving (to the brain!), but not too strenuous that our minds must devote mental energy to the act of phsyical exercise, the oxygen from the fresh air, the feeling of _wandering_ and letting our minds wander.
Sometimes I struggle with deep thinking at my desk - its too quiet / stable. A little bit of distraction helps. Not to say I don’t think while at my desk, I just think walking is a great compliment and in our sedentary lives, better to think on our feet and leave the desk to implementation / coding.
I say this after two productive walks today :)