Kinematic and kinetic characteristics of stepping over a 10-cm-high obstacle in older adults

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[Purpose] The purpose of this research was to clarify the common responses shared by a high-falldown-risk group of older adults and develop an exercise-learning program to prevent falls. [Subjects] Thirty-four subjects were chosen from those who use the daycare program of a nursing home at least once week. [Methods] All subjects were categorized in longer or shorter-MSL groups. Ninety-second stepping from two force plates to a 10-cm-high box was executed under three conditions. The locus length of the COP,toe-obstacle distance,and step length were used as experimental data. [Results] The coefficient between the MSL and COP was from 0.69 to 0.73. The shorter-MSL group showed smaller COP movements in the A-P direction and a smaller toe-obstacle distance between the single stepping and stepping with the visual task and between the single stepping and stepping with the auditory task. No significant difference was noted in the step length between the two groups. [Conclusion] The shorter-MSL group was easily affected by the dual-task, suggesting that the shorter-MSL group has a high risk of falling when negotiating obstacles. Stepping exercise with the dual-task using the COP movements as a feedback index may be useful for older adults who have a smaller MSL.
藍野大学の論文