Effects of walking speed on gait stability and interlimb coordination in younger and older adults

被引:50
作者
Krasovsky, Tal [1 ,3 ]
Lamontagne, Anouk [1 ,3 ]
Feldman, Anatol G. [2 ,3 ]
Levin, Mindy F. [1 ,3 ]
机构
[1] McGill Univ, Sch Phys & Occupat Therapy, Montreal, PQ H3G 1Y5, Canada
[2] Univ Montreal, Dept Physiol, Montreal, PQ H3C 3J7, Canada
[3] Ctr Interdisciplinary Res Rehabil, Montreal, PQ, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
Perturbation; Central pattern generators; Locomotion; Aging; RECOVERY; FALLS; STRATEGIES; PREDICTORS; MOTION;
D O I
10.1016/j.gaitpost.2013.08.011
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Many falls in older adults occur during walking following trips. Following a trip, older adults take longer than younger adults to recover steady-state walking. Although faster gait speed may improve interlimb coordination, it may also increase fall risk in older adults. We hypothesized that older adults would take longer than younger adults to recover from an unexpected perturbation during gait especially when walking faster. Twelve younger (26.3 +/- 4.4 years) and 12 older adults (68.5 +/- 3.4 years) walked at comfortable, faster and slower speeds when movement of the dominant leg was unexpectedly arrested for 250 ms at 20% swing length. Gait stability was evaluated using the short-and longer-term response to perturbation. In both groups, walking faster diminished the occurrence of elevation and increased that of leg lowering. Older adults took longer than younger adults to recover steady-state walking at all speeds (3.36 +/- 0.11 vs. 2.89 +/- 0.08 strides) but longer-term recovery of gait stability was not related to gait speed. Arm-leg and inter-arm coordination improved with increasing gait speed in both groups, but older adults had weaker inter-leg coupling following perturbation at all speeds. Although both younger and older adults used speed appropriate responses immediately following perturbation, longer duration of recovery of steady-state walking in older adults may increase fall risk in uncontrolled situations, regardless of gait speed. Recovery from perturbation when walking faster was associated with better interlimb coordination, but not with better gait stability. This indicates that interlimb coordination and gait stability may be distinct features of locomotion. (C) 2013 Elsevier B. V. All rights reserved.
引用
收藏
页码:378 / 385
页数:8
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