doi:
In Figure 1F, the number 0.24 should be 2.4 instead. The
incorrect Froude number given for human walking (0.24)
corresponds to 1.5m/s, which is closer to the preferred speed of human walking. The correct number now given (2.4)
corresponds to a speed of about 4.6m/s.
The
incorrect Figure 1 is found at: doi:.