Fig. 9. Swing direction and temporal distribution of short steps. Swing direction (AEP relative to PEP) is defined in four groups (f, forward; b, backward; o, outward; i, inward; coordinate system is shown in the inset figure below). Temporal distribution is defined according to the five sections EFL to HL (see Fig. 1 for abbreviations); short steps caused by the levator or TOT-reflex and by clinging to the second footbridge have not been taken into account.