This is a fantastic video in which Alan Watts discusses work as play. In the clip he specifically references running on the balls of your feet vs running on your heels. He doesn't mention barefoot running specifically, but that's not the point. The take away here is threefold, all in short succession:
- Don't jar your body by landing on the heels.
- Running should be a fun and beautiful dance.
- Suffering isn't everything.
Skip to 4:38 if it doesn't go there automatically when you press play.
As an aside, it has been a long time since I've written anything. I plan to rectify that in the upcoming months and post on a more consistent basis.