Laboratory of Neuro-Biomechanics, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy.
Section of Physiology, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy.
Sensors (Basel). 2021 Dec 24;22(1):95. doi: 10.3390/s22010095.
The Timed Up and Go (TUG) test quantifies physical mobility by measuring the total performance time. In this study, we quantified the single TUG subcomponents and, for the first time, explored the effects of gait cycle and pelvis asymmetries on them. Transfemoral (TF) and transtibial (TT) amputees were compared with a control group. A single wearable inertial sensor, applied to the back, captured kinematic data from the body and pelvis during the 10-m walk test and the TUG test. From these data, two categories of symmetry indexes (SI) were computed: One SI captured the differences between the antero-posterior accelerations of the two sides during the gait cycle, while another set of SI quantified the symmetry over the three-dimensional pelvis motions. Moreover, the total time of the TUG test, the time of each subcomponent, and the velocity of the turning subcomponents were measured. Only the TF amputees showed significant reductions in each SI category when compared to the controls. During the TUG test, the TF group showed a longer duration and velocity reduction mainly over the turning subtasks. However, for all the amputees there were significant correlations between the level of asymmetries and the velocity during the turning tasks. Overall, gait cycle and pelvis asymmetries had a specific detrimental effect on the turning performance instead of on linear walking.
计时起身行走测试（TUG）通过测量总用时来量化身体的移动能力。在本研究中，我们量化了 TUG 的各个单项指标，并首次探讨了步态周期和骨盆不对称性对其的影响。我们将股骨（TF）和胫骨（TT）截肢者与对照组进行了比较。一个可穿戴的惯性传感器贴在背部，在 10 米步行测试和 TUG 测试中记录了身体和骨盆的运动学数据。从这些数据中，我们计算了两类对称性指标（SI）：一类 SI 捕捉了步态周期中两侧前后加速度的差异，另一类 SI 则量化了三维骨盆运动的对称性。此外，我们还测量了 TUG 测试的总用时、各个单项用时以及转弯单项的速度。与对照组相比，只有 TF 截肢者在所有 SI 类别中都显示出显著的降低。在 TUG 测试中，TF 组在转弯子任务上表现出用时延长和速度降低，主要是转弯任务。然而，对于所有截肢者来说，在转弯任务中，不对称性的程度与速度之间存在显著的相关性。总的来说，步态周期和骨盆不对称性对转弯性能有特定的不利影响，而不是对直线行走有影响。
