Dynamic Trunk Stability During Sitting in Young and Elderly Individuals

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Objective : It is difficult to precisely define trunk balance in standing position because postural sway is controlled by the lower limbs. Therefore, we safely determined trunk balance in sitting position using a new device. Materials & Methods : Twenty-eight healthy elderly volunteers and Twenty-eight healthy young volunteers were participated. Postural sway was measured while seated using a new balance device. The device inclines the seat to the right and left 0.6 Hz. A force plate underneath a seat slanted to a maximum of 3° tracks the location of the center of pressure. We evaluated locus length (LNG), locus length/second (LNG/TIME), enveloped area (ENV-AREA), root mean square area (RMS-AREA) and locus length per unit area (LNG/AREA). Result : Values for LNG, LNG/TIME, ENV-AREA, and RMS-AREA were significantly worse for the elderly, compared with the young group (p<0.01). However, LNG/AREA did not significantly differ between the two groups (p=0.0136). Conclusion : LNG/AREA did not significantly differ between young and elderly participants witch suggest that our device could precisely measure trunk balance without any influence of the lower extremities. Trunk balance can be safely examined in elderly people with a new device.

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  • 秋田医学

    秋田医学 40 (3/4), 157-161, 2014-03-31

    秋田医学

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