“It is normally easy and actually quite pleasant to walk and think at the same time, but at the extremes these activities appear to compete for the limited resources of System 2. You can confirm this claim by a simple experiment. While walking comfortably with a friend, ask him to compute 23 × 78 in his head, and to do so immediately. He will almost certainly stop in his tracks.” -- Daniel Kahneman, Thinking, Fast and Slow (2011)

https://www.goodreads.com/quotes/1403110-it-is-normally-easy-and-actually-quite-pleasant-to-walk

#walking #thinking