Background: Younger adults (YA) may primarily regulate mediolateral stability during walking through proactive control of net ground reaction force orientation, with residual instability during challenging gait conditions mediated by reactive force generation later in the gait cycle. We sought to understand if older adults (OA) use a similar reactive strategy to regulate mediolateral stability during walking when proactive control is limited.
Research Question: Do gait velocity and step width constraints differentially alter mediolateral gait stability control among healthy younger (18-35) and older (>65) participants?
Methods: 28 YA and 28 OA performed normal (NW), fast (FW) and narrow base (NBW) walking conditions across an instrumented walkway.
Background: Previous work has linked the eccentricity of the net ground reaction force (GRF) to increased mediolateral instability during single-step voluntary and compensatory stepping responses. The present work sought to understand the extent to which such control mechanisms for mediolateral stability are present during gait.
Research Question: How do gait velocity and step width constraints influence the kinetic control of mediolateral stability control among healthy participants?
Methods: 25 participants performed three walking conditions - normal walking with self-selected speed and foot-placement, fast walking with self-selected foot-placement, and narrowbase walking - across a 10-meter walkway.