Symmetry of the elbow kinematics during racing wheelchair propulsion
Symmetry of the elbow kinematics during racing wheelchair propulsion
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DOI：
10.1080/001401398185983
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发表时间：
1998-12-01
期刊：
影响因子：
2.4
通讯作者：
Campbell, IG
中科院分区：
文献类型：
--
作者：
Goosey, VL;Campbell, IG
本研究的目的是确定受过训练的轮椅赛车手的肘部运动模式在轮椅推进过程中是否存在双侧对称性。七名经过耐力训练的轮椅赛车手自愿参加这项研究。每个受试者在自己的赛车轮椅上以 14 英里/小时（6.58 毫秒（-1））的速度推动单滚轮轮椅测力计时，都会通过二维视频分析进行记录。从左侧和右侧获得肘部弯曲的范围、肘部方向和选定的计时参数，包括循环时间和与手轮接触的时间（推进阶段）。 Wilcoxon 配对符号排序测试确定了轮椅推进的左右矢状平面图像之间的差异。此外，Bland-Altman 方法确定了左右矢状平面图像之间的一致性。结果表明，左右侧的推进相位、肘部高度和肘部角位移特性没有显着差异。恢复阶段右肘高于左肘，但差异幅度仅为 0.03 m (N.S)。与椅子设计和运动员姿势相关的因素可能导致左右两侧之间出现微小差异。总之，结果似乎表明，轮椅推进过程中肘部运动模式双侧对称的假设对于该组来说是有效的。然而，值得注意的是，个体之间存在不对称性，需要进一步研究。
The purpose of this study was to establish whether bilateral symmetry exists during wheelchair propulsion in the elbow movement pattern of trained wheelchair racers. Seven endurance-trained wheelchair racers volunteered to participate in the study. Each subject was recorded by two-dimensional video analysis while pushing on a single-roller wheelchair ergometer at 14 mph (6.58 ms(-1)) in their own racing wheelchair. The range of elbow flexion, elbow orientation and selected timing parameters including cycle time and time spent in contact with the handrim (propulsion phase) were obtained from both left and right sides. Wilcoxon Matched-Pairs Signed-Ranks tests determined the differences between the left and right sagittal plane images of wheelchair propulsion. Furthermore, the Bland-Altman method determined the agreement between the left and right sagittal plane images. The results indicated that the propulsion phase, elbow height and elbow angular displacement characteristics were not significantly different between right and left sides. The right elbow was higher than the left during the recovery phase, but the magnitude of this difference was only 0.03 m (N.S). Factors associated with chair design and the athlete's posture may have contributed to the small differences noted between left and right sides. In conclusion, the results appear to suggest that the assumption of bilateral symmetry of the elbow movement pattern during wheelchair propulsion is valid for the group. However, it is important to note that asymmetries exist in individuals and further research is warranted.