Biped dynamics calculate a biped's airborne trajectory, the bending of its knee or knees on landing, and the biped position so it maintains balance when the spine is rotated. When the position or animation of the biped change, dynamics cause the biped to adapt.
There are six parameters that affect biped dynamics. Three are in the Body section of the Key Info rollout:
The other three are on the Dynamics & Adaptation rollout: