The figure 8 on a bight knot can be used for the following (p. e)

A figure-eight on a bight is used to secure a bight in the end of the rope. This knot is commonly used to “tie-in” to the rope. A figure-eight on a bight is a large knot with relatively gradual bends (as compared to an overhand), and is easily recognized by the tell tale “8” shape.

True, using a pedometer can promote a physically active lifestyle.