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首页> 外文期刊>Gait & posture >The change of gait parameters during walking at different percentage of preferred walking speed for healthy adults aged 20-60 years.
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The change of gait parameters during walking at different percentage of preferred walking speed for healthy adults aged 20-60 years.

机译：对于20至60岁的健康成年人，在步行过程中步态参数的变化以不同的首选步行速度百分比发生。

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摘要

This study aims to investigate the effects of age, gender and walking speed on the gait performance during walking at a range of percentage of preferred walking speed (PPWS). The subjects were aged from 20 to 60 years and both genders were equally represented. A nested-factorial analysis of variance was employed. The independent variables include walking speed (80%, 100%, 120%, and 140% PPWS), age (young, middle, and older groups) and gender. The response measures include lower limb joint motion, vertical ground reaction force (VGRF), muscle electromyography (EMG), heart rate, and perceived exertion of whole body and local areas. The results show that different age and gender groups had similar gait performance on most of the joint motions, HR, as well as the perceived exertions while walking at a range of PPWS. In addition, these performance generally increased with the increasing walking speed and the trend becomes more obvious when the speed was higher than 120% PWS. Age and gender differences have been found in VGRFs and muscle EMG. Females exhibited significantly higher VGRF in the heel-strike and toe-off stages, as well as higher tibialis anterior muscle activity. Older subjects had significantly higher rectus femoris muscle activity than younger adults. Besides, the interaction between gender and walking speed was significant on VGRF in the toe-off stage. Further discussions are addressed.
机译：这项研究旨在调查年龄，性别和步行速度对步行过程中步态表现的影响，其变化范围为首选步行速度（PPWS）的百分比。受试者年龄在20至60岁之间，并且男女人数均相等。采用方差的嵌套因子分析。自变量包括步行速度（80％，100％，120％和140％PPWS），年龄（年轻，中，老年组）和性别。响应措施包括下肢关节运动，垂直地面反作用力（VGRF），肌肉肌电图（EMG），心率以及整个身体和局部区域的感知运动。结果表明，不同年龄段和性别组在大多数PPWS行走时，在大多数关节运动，心率以及所感知的运动方面，步态表现均相似。此外，这些性能通常随着步行速度的增加而增加，并且当速度高于120％PWS时，趋势会变得更加明显。在VGRF和肌肉EMG中发现了年龄和性别差异。女性在脚后跟打击和脚趾移出阶段表现出明显较高的VGRF，以及胫骨前肌的活动较高。年龄较大的受试者的股直肌活动明显高于年轻人。此外，性别与步行速度之间的相互作用在足趾阶段VGRF上是显着的。解决了进一步的讨论。

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