Foreknowledge of postural demands of an upcoming step modulates rapid stepping behaviour

Our results suggest that foreknowledge of low postural demands during anterolateral steps lets people safely launch EVRs while suppressing ML-APAs, prioritizing shorter RTs over balance. In contrast, foreknowledge of high postural demands during anteromedial steps leads people to prioritize balance, expressing ML-APAs and delaying step initiation. Our findings are relevant for individuals with impaired balance control, in whom prioritization of balance may impact rapid stepping.