Discussion
This study attempted to investigate the interaction between the effect of different inclines and the effect of different types of plantar vibration in gait characteristics and respective variabilities among healthy young adults. The results partially agreed with our hypothesis that a significant interaction was found in the stride time and step width. Specifically, the supra-threshold plantar vibration decreased the stride time during downhill walking, and the sub-threshold plantar vibration increased the step width during uphill walking. However, the interaction didn’t reach the levels of significance in the gait variabilities.