Energetics of Walking in Elderly People: Factors Related to Gait Speed
Energetics of Walking in Elderly People: Factors Related to Gait Speed
复制标题
DOI：
10.1093/gerona/glq137
复制
发表时间：
2010-12-01
影响因子：
5.1
通讯作者：
Evans, William J.
中科院分区：
文献类型：
--
作者：
Fiser, Wesley M.;Hays, Nicholas P.;Evans, William J.
老年人步行速度慢预示着发病率和死亡率增加。我们研究了可能与老年男性和女性习惯性步行速度降低相关的因素，招募了老年男性（n = 25）和女性（n = 24）（范围：60-88岁，平均= 72.5岁）。测定了运动功能成套测验、身体成分、跑台上的VO（2峰）、以习惯步速和0.9m/s步速步行10分钟的VO（2）和主观用力、肌力和体力活动水平，VO（2峰）与习惯步速密切相关（r = 0.744，p <0.001），并且即使在控制年龄、肌肉强度和性别之后仍然显著。与三分之一的步行最快的人相比，（平均步态速度，1.37 +/- 0.04 m/s），最慢步行者的三分之一（0.87 +/- 0.02 m/s）年龄较大（p < .001），较短（p = .026），具有较低的瘦体重（p = .011），强度较低（p < .001），自我报告的每日体力活动较少（p = 0.102），相对较高以习惯速度行走时的（至VO（2 peak））强度（VO（2 peak）的65.3% +/- 3.9% vs 54.3% +/- 2.1%，p = 0.013）VO（2 peak）与习惯性步行速度密切相关，表明随着有氧能力随年龄的增长而下降，与习惯性步态速度相关的用力增加。步行速度减慢可能是对增加的用力感知的反应。运动训练在多大程度上影响习惯性步态速度和疲劳尚不清楚。
Slow walking speed in elderly people predicts increased morbidity and mortality. We examined factors that may be associated with decreased habitual walking speed in older men and women.Older (range: 60-88 years, mean = 72.5 years) men (n = 25) and women (n = 24) were recruited. The Short Physical Performance Battery, body composition, VO(2peak) on a treadmill, VO(2) and rated perceived exertion during 10 minutes of walking at habitual gait speed and at a walking speed of 0.9 m/s, muscle strength, and level of physical activity were measured.VO(2peak) was strongly related to habitual gait speed (r = .744, p < .001) and remained significant even after controlling for age, muscle strength, and gender. Compared with the tertile of fastest walkers (mean gait speed, 1.37 +/- 0.04 m/s), the tertile of slowest walkers (0.87 +/- 0.02 m/s) were older (p < .001), shorter (p = .026), had lower lean body mass (p = .011), lower strength ( p < .001), less self-reported daily physical activity (p = .102), and higher relative (to VO(2peak)) intensity during walking at their habitual speed (65.3% +/- 3.9% vs 54.3% +/- 2.1% of VO(2peak), p = .013).VO(2peak) was strongly associated with habitual walking speed, suggesting that as aerobic capacity declines with age, the exertion associated with habitual gait speed increases. A slowing of walking speed may be a response to increased perception of exertion. The extent to which exercise training affects habitual gait speed and fatigue is not clear.