Using force data to self-pace an instrumented treadmill and measure self-selected walking speed
Using force data to self-pace an instrumented treadmill and measure self-selected walking speed
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DOI：
10.1186/s12984-020-00683-5
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发表时间：
2020-06-03
影响因子：
5.1
通讯作者：
Collins, Steven H.
中科院分区：
文献类型：
--
作者：
Song, Seungmoon;Choi, Hojung;Collins, Steven H.
背景自选速度是步行的一项重要功能指标。在以跑步机为基础的实验室里，一种无需额外硬件就能可靠地匹配行走速度的自定步速控制器，对于测量自己选择的速度很有用。方法我们采用了以前提出的用于测力仪式跑步机的自动起搏控制器，并验证了其用于测量自己选择的速度的用途。我们首先评估了控制器对物体速度和位置的估计，方法是将其与运动捕捉数据进行比较。然后，我们比较了五项自选速度测试。10名健康成年人完成了标准的10米步行测试、150米步行测试、常用的手动跑步机速度选择测试、两分钟自定步速跑步机测试和150米自定步速跑步机测试。在每种情况下，受试者都被指示以舒适的速度行走或选择合适的速度。我们还评估了一次试验所花费的时间，以及在所有测试中选择速度的舒适性和简易性的调查。结果自调搏算法准确估计了被摄体的速度和位置，与S(-1)的0.023 m和0.014 m的运动捕捉相比，均方根差异较大。两种自定步速跑步机测试的自选速度与10米步行测试的速度相关性很好(R&gT；0.93，p
Background Self-selected speed is an important functional index of walking. A self-pacing controller that reliably matches walking speed without additional hardware can be useful for measuring self-selected speed in a treadmill-based laboratory. Methods We adapted a previously proposed self-pacing controller for force-instrumented treadmills and validated its use for measuring self-selected speeds. We first evaluated the controller's estimation of subject speed and position from the force-plates by comparing it to those from motion capture data. We then compared five tests of self-selected speed. Ten healthy adults completed a standard 10-meter walk test, a 150-meter walk test, a commonly used manual treadmill speed selection test, a two-minute self-paced treadmill test, and a 150-meter self-paced treadmill test. In each case, subjects were instructed to walk at or select their comfortable speed. We also assessed the time taken for a trial and a survey on comfort and ease of choosing a speed in all the tests. Results The self-pacing algorithm estimated subject speed and position accurately, with root mean square differences compared to motion capture of 0.023 m s (-1) and 0.014 m, respectively. Self-selected speeds from both self-paced treadmill tests correlated well with those from the 10-meter walk test (R>0.93,p