Barefoot Running

While training for the Leadville Marathon and the Black Hills Ultra Marathon I removed my shoes and ran barefoot for a stretch during my 30-mile training run to experiment with the grounding effect. More on grounding:
https://www.youtube.com/watch?v=cRW0XO2xWn4&t=599s
More on my 30-mile training run:
https://www.youtube.com/watch?v=9vy3lvoW6CI&t=11s