Kinematic effects of a passive lift assistive exoskeleton
Kinematic effects of a passive lift assistive exoskeleton
复制标题
被动举升辅助外骨骼的运动效应
DOI：
10.1016/j.jbiomech.2021.110317
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发表时间：
2021
影响因子：
2.4
通讯作者：
Asbeck, Alan T.
中科院分区：
文献类型：
--
作者：
Simon, Athulya A.;Alemi, Mohammad Mehdi;Asbeck, Alan T.
VT-Lowe的外骨骼设计用于在重复的举重任务中帮助支撑背部。本研究的重点是在三种不同的举重方式（自由式，蹲下和弯腰）和两种不同的箱子重量（0%和20%的体重）之间的运动学差异与和没有外骨骼（与exo和Without-Exo）。12名年轻健康男性（年龄23.5 +/-4.42岁;身高179.33 +/-6.37 cm;体重80.4 +/-5.59 kg）参加了本研究。分析的变量包括踝关节和膝关节角度以及肩髋膝关节（SHK）之间的角度;肩、肘和腕关节高度;以及举重速度和加速度。还分析了躯干角度、SHK角度、躯干重心、躯干扭矩、箱高以及相关研究的肌电（EMG）数据之间的关系。平均而言，穿戴外骨骼导致踝关节背屈增加1.5度，膝关节屈曲减少2.6度，SHK角减少2.3度。受试者的肩膀，肘部和手腕的高度略高，而穿着外骨骼，他们提出稍微慢，而穿着外骨骼。与站立相比，受试者在弯腰时移动得更快，并且与0%体重箱相比，与20%体重箱相比。自由式托举的值通常介于蹲举和弯腰托举之间，或者与蹲举没有显著差异。腿部肌肉的EMG数据与躯干扭矩有关系，而背部和腹部肌肉没有显着的关系。
The VT-Lowe’s exoskeleton was designed to help support the back during repetitive lifting tasks. This study focused on the kinematic differences between lifting with and without the exoskeleton (With-Exo and Without-Exo) over three different lifting styles (Freestyle, Squat, and Stoop) and two different box weights (0% and 20% of bodyweight). Twelve young and healthy males (Age 23.5 +/− 4.42 years; Height 179.33 +/− 6.37 cm; Weight 80.4 +/− 5.59 kg) participated in this study. Variables analyzed include the ankle and knee angles and angle between the Shoulder-Hip-Knee (SHK); the shoulder, elbow, and wrist heights; and the lifting speed and acceleration. The relationships between the torso angle, SHK angle, center of mass of the torso, torso torque, box height, as well as electromyography (EMG) data from a related study were also analyzed. On average, wearing the exoskeleton resulted in a 1.5 degree increase in ankle dorsiflexion, a 2.6 degree decrease in knee flexion, and a decrease of 2.3 degrees in SHK angle. Subjects’ shoulder, elbow, and wrist heights were slightly higher while wearing the exoskeleton, and they lifted slightly more slowly while wearing the exoskeleton. Subjects moved more quickly while bending down as compared to standing up, and with the 0% bodyweight box as compared to the 20% bodyweight box. The values for Freestyle lifts generally fell in between Squat and Stoop lift styles or were not significantly different from Squat. EMG data from the leg muscles had relationships with torso torque while the back and stomach muscles showed no significant relationships.