Ogaya Shinya, Higuchi Yumi, Tanaka Masao, Fuchioka Satoshi
Division of Physical Therapy, Department of Comprehensive Rehabilitation, Osaka Prefecture University ; Division of Bioengineering, Department of Mechanical Science and Bioengineering, Graduate School of Engineering Science, Osaka University.
J Phys Ther Sci. 2013 Aug;25(8):901-3. doi: 10.1589/jpts.25.901. Epub 2013 Sep 20.
[Purpose] Accuracy in coordinating limb movements decreases with aging. The effect of aging on the variability of cyclic movements is not well known. The aim of this study was to examine the effect of aging on seated stepping variability. [Subjects and Methods] Twenty-six healthy young adults and 15 healthy elderly adults were instructed to walk at their preferred speed. Foot contact was monitored using reflective markers. Seated stepping was performed on force plates. The participants synchronized their stepping with 6 different metronome beats: 90-140 beats per minute (bpm). The time-series coefficient of variation (CV) was calculated. [Results] The cadence of young adults was 121 steps/min and that of the elderly adults was 125 steps/min in the elderly adults. The seated stepping CV decreased gradually from 90 to 120 bpm, but sharply increased at 130 and 140 bpm. Compared to young adults, the elderly adults had significantly higher CVs of seated stepping; however, the intergroup difference in the CV of seated stepping at 120 bpm was negligible. [Conclusions] Our results suggest that the stepping accuracy of the elderly is decreased; however, the rhythmic seated stepping accuracy does not decrease at the same rate as gait.
[目的] 随着年龄增长，肢体运动协调的准确性会下降。衰老对周期性运动变异性的影响尚不清楚。本研究的目的是探讨衰老对坐姿踏步变异性的影响。[对象与方法] 26名健康青年人和15名健康老年人被要求以自己喜欢的速度行走。使用反光标记监测足部接触情况。在测力板上进行坐姿踏步。参与者将他们的踏步与6种不同节拍器节拍同步：每分钟90 - 140次节拍（bpm）。计算时间序列变异系数（CV）。[结果] 青年人的步频为121步/分钟，老年人的步频为125步/分钟。坐姿踏步CV从90到120 bpm逐渐下降，但在130和140 bpm时急剧增加。与青年人相比，老年人的坐姿踏步CV显著更高；然而，在120 bpm时坐姿踏步CV的组间差异可忽略不计。[结论] 我们的结果表明老年人的踏步准确性下降；然而，有节奏的坐姿踏步准确性下降速度与步态不同。
