D25 The Hardest Step from 6 Million Step Man - Dr Dan Davidson

D25 The Hardest Step

5 minutes Posted Sep 26, 2017 at 8:25 pm.

0:00

5:42

Share at current time

Show notes

The Hardest Step - 2000 steps in a mile - the first step must overcome the " Coefficient of Friction" - Take the first step in the right direction!