Measurement of the Chair Rise Performance of Older People Based on Force Plates and IMUs
Measurement of the Chair Rise Performance of Older People Based on Force Plates and IMUs
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DOI：
10.3390/s19061370
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发表时间：
2019-03-19
期刊：
影响因子：
3.9
通讯作者：
Hein, Andreas
中科院分区：
文献类型：
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作者：
Hellmers, Sandra;Fudickar, Sebastian;Hein, Andreas
早期发现随年龄增长的功能衰退对于在早期状态开始干预并延长功能适应性非常重要。为了确保这种早期发现，必须经常定期进行功能评估。由于五次椅子起身试验（5CRT）是老年领域的一项成熟试验，因此该试验应得到技术支持。我们介绍了一种方法，自动检测执行的椅子上升测试通过惯性传感器集成到皮带。通过20名年龄为72-89岁（78.2 +/- 4.6岁）的受试者评价了系统的适用性，并通过秒表、惯性测量单元（IMU）、KinectA（R）相机和测力板进行了测量。基于多层感知器的分类器检测IMU数据中的转换，F1分数约为94.8%。通过基于规则的模型，基于顺序运动的正确发生来检测5CRT的有效执行。自动计算的测试持续时间的结果与秒表测量结果非常一致（相关系数r = 0.93（p < 0.001））。对单个测试循环持续时间的分析表明，在测试结束时开始疲劳。一个人的运动模式的比较显示出相似的运动模式，其在形式和持续时间上仅略有不同，由此不同的受试者表示关于他们的表现策略的变化。
An early detection of functional decline with age is important to start interventions at an early state and to prolong the functional fitness. In order to assure such an early detection, functional assessments must be conducted on a frequent and regular basis. Since the five time chair rise test (5CRT) is a well-established test in the geriatric field, this test should be supported by technology. We introduce an approach that automatically detects the execution of the chair rise test via an inertial sensor integrated into a belt. The system's suitability was evaluated via 20 subjects aged 72-89 years (78.2 +/- 4.6 years) and was measured by a stopwatch, the inertial measurement unit (IMU), a KinectA (R) camera and a force plate. A Multilayer Perceptrons-based classifier detects transitions in the IMU data with an F1-Score of around 94.8%. Valid executions of the 5CRT are detected based on the correct occurrence of sequential movements via a rule-based model. The results of the automatically calculated test durations are in good agreement with the stopwatch measurements (correlation coefficient r = 0.93 (p < 0.001)). The analysis of the duration of single test cycles indicates a beginning fatigue at the end of the test. The comparison of the movement pattern within one person shows similar movement patterns, which differ only slightly in form and duration, whereby different subjects indicate variations regarding their performance strategies.