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首页> 外文期刊>Gait & posture >Effects of constrained arm swing on vertical center of mass displacement during walking
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Effects of constrained arm swing on vertical center of mass displacement during walking

机译：受约束的手臂摆动对行走过程中质心垂直位移的影响

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The purpose of this study was to determine the effects of constraining arm swing on the vertical displacement of the body's center of mass (COM) during treadmill walking and examine several common gait variables that may account for or mask differences in the body's COM motion with and without arm swing. Participants included 20 healthy individuals (10 male, 10 female; age: 27.8 +/- 6.8 years). The body's COM displacement, first and second peak vertical ground reaction forces (VGRFs), and lowest VGRF during mid-stance, peak summed bilateral VGRF, lower extremity sagittal joint angles, stride length, and foot contact time were measured with and without arm swing during walking at 134 m/s. The body's COM displacement was greater with the arms constrained (arm swing: 4.1 +/- 1.2 cm, arm constrained: 4.9 +/- 1.2 cm, p < 0.001). Ground reaction force data indicated that the COM displacement increased in both double limb and single limb stance. However, kinematic patterns visually appeared similar between conditions. Shortened stride length and foot contact time also were observed, although these do not seem to account for the increased COM displacement. However, a change in arm COM acceleration might have contributed to the difference. These findings indicate that a change in arm swing causes differences in vertical COM displacement, which could increase energy expenditure. (C) 2015 Elsevier B.V. All rights reserved.
机译：这项研究的目的是确定在跑步机行走过程中约束手臂摆动对人体质心（COM）垂直位移的影响，并研究几种常见的步态变量，这些变量可能解释或掩盖了人体COM运动与和的差异。没有手臂摆动。参与者包括20位健康个体（10位男性，10位女性;年龄：27.8 +/- 6.8岁）。在有和没有手臂摆动的情况下，测量了人体的COM位移，第一和第二峰值垂直地面反作用力（VGRF）以及中位期间的最低VGRF，峰值总和双侧VGRF，下肢矢状关节角度，步幅长度和脚接触时间在以134 m / s的速度行走时。手臂受约束时，人体的COM位移更大（手臂摆动：4.1 +/- 1.2 cm，手臂受约束：4.9 +/- 1.2 cm，p <0.001）。地面反作用力数据表明，COM位移在双肢和单肢姿态中均增加。但是，运动模式在条件之间在视觉上看起来相似。还观察到步幅缩短和脚部接触时间缩短，尽管这些似乎并不能说明COM位移增加。但是，手臂COM加速度的变化可能是造成这种差异的原因。这些发现表明，手臂摆动的变化会引起垂直COM位移的差异，这可能会增加能量消耗。 （C）2015 Elsevier B.V.保留所有权利。

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