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• W3030887788 abstract "Abstract 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 <1×10 −13 ). Subjects walked slower on average in the self-paced treadmill tests (1.23±0.27 ms −1 ) than in the 10-meter walk test (1.32±0.18 ms −1 ) but the speed differences within subjects were consistent. These correlations and walking speeds are comparable to those from the manual treadmill speed selection test ( R =0.89, p =3×10 −11 ;1.18±0.24 ms −1 ). Comfort and ease of speed selection were similar in the self-paced tests and the manual speed selection test, but the self-paced tests required only about a third of the time to complete. Our results demonstrate that these self-paced treadmill tests can be a strong alternative to the commonly used manual treadmill speed selection test. Conclusions The self-paced force-instrumented treadmill well adapts to subject walking speed and reliably measures self-selected walking speeds. We provide the self-pacing software to facilitate use by gait researchers and clinicians." @default.
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• W3030887788 date "2020-06-03" @default.
• W3030887788 modified "2023-10-18" @default.
• W3030887788 title "Using force data to self-pace an instrumented treadmill and measure self-selected walking speed" @default.
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• W3030887788 doi "https://doi.org/10.1186/s12984-020-00683-5" @default.
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