I walk at a brisk steady pace and my breathing has increased with my heart rate for a good chunk of my hike. I do this four times a workday, as I go home for lunch. I really enjoy the weather, no matter how cold, icy, rainy or sunny it may be. Sometimes I will listen to the local AM news, other times I just think.
It is during these times that I debate various issues, plan out things to do around the house and yard, or just wonder about the nature of the univerise. I highly recommend "Me time"