Impact of foot-transmitted vibration on gait metrics, kinematics, and dynamic stability
研究让21名受试者在振动平台上行走，发现侧向高频振动影响最大，导致身体采取补偿策略来保持稳定，提示需要针对步行时足部传递振动制定专门的评估曲线。
Transport operators face increased risks of injuries and falls while walking on a vibrating floor. No standards exist for human exposure to foot-transmitted vibration (FTV). In this study, twenty-one subjects walked on a treadmill constrained on a moving platform used to apply harmonic vibrations in four directions (mediolateral, anteroposterior, roll, and pitch) at four frequencies (0.5, 0.75, 1, and 1.5 Hz) with constant displacement (2 cm or 1°). The gait metrics, kinematic, and stability data were extracted in correspondence with the onset/offset of platform movement and when the steady-state of FTV was reached. Mediolateral vibration at the highest frequency was the most impactful condition, leading to the adoption of compensatory strategies to stabilize the center of mass closer to the floor and enlarge the base of support. These findings suggest that, from a normative perspective, a specific weighting curve is needed to assess human response to FTV while walking, since it varies as a function of vibration frequency and direction.