Physical fatigue affects gait characteristics in older persons
Physical fatigue affects gait characteristics in older persons
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DOI：
10.1093/gerona/62.9.1010
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发表时间：
2007-09-01
影响因子：
5.1
通讯作者：
Sletvold, Olav
中科院分区：
文献类型：
--
作者：
Helbostad, Jorunn L.;Leirfall, Sara;Sletvold, Olav
背景疲劳影响老年人自我报告的功能。平衡和步态问题增加跌倒风险。一般而言，身体疲劳对老年人群的影响，特别是对步行过程中的平衡控制的影响还不清楚。本研究探讨了重复的坐立任务如何影响老年人的步态控制。22人（平均年龄78岁）参加了疲劳组（FG），22人（平均年龄80岁）在匹配的对照组（CG）。参与者以不同的步行速度在人行道上来回行走。步态数据进行了调整，前测后测的步行速度的差异。FG受试者通过反复的坐-站任务进行身体疲劳，躯干数据通过三轴加速度计获得，足部水平数据通过电子走道获得。疲劳任务后，首选步态速度（p= 0.96）或步长（p= 0.47）没有组间差异，但FG组的步长（p= 0.023）和中外侧躯干加速度幅度（p= 0.038）显著增加。仅在FG中，垂直方向的步长变异性（p= 0.004）和跨躯干加速度变异性（p= 0.002）增加，并且在前后方向上有增加的趋势（p= 0.10），在内外侧方向上有减少的趋势（p= 0.10）。结论。身体疲劳任务后的步态变化与以前发现的老年人跌倒风险的变化一致，表明身体疲劳可能是老年人福尔斯跌倒的危险因素。
Background. Fatigue affects self-reported functioning in older persons. Balance and gait problems increase fall risk. The effect of physical fatigue in the elderly population in general, and on balance control during walking in particular is not well known. This study investigates how a repeated sit-to-stand task affects gait control in older persons.Methods. Twenty-two persons (mean age 78 years) took part in a fatigue group (FG), and 22 persons (mean age 80 years) in a matched control group (CG). Participants walked back and forth on a walkway at different walking speeds. Gait data were adjusted for pretest-posttest differences in walking speed. The FG participants were physically fatigued by a repeated sit-to-stand task, Trunk data were obtained by a triaxial accelerometer and foot level data by an electronic walkway.Results. There were no group differences in preferred gait speed (p=.96) or in step length (p=.47) following the fatiguing task, but there were significant increases in step width (p=.023) and in mediolateral trunk acceleration amplitude (p=.038) in the FG group. Step-length variability (p=.004) and interstride trunk acceleration variability in the vertical direction (p=.002) increased, and tended to increase in the anteroposterior direction (p=.10) and to decrease in the mediolateral direction (p=.10) in the FG only.Conclusion. Gait changes following a physical fatiguing task agree with changes previously found in older persons at risk of falling, suggesting that physical fatigue may represent a risk factor for falls in elderly persons.