NDLI: A Novel Simplified System to Estimate Lower-Limb Joint Moments during Sit-to-Stand

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A Novel Simplified System to Estimate Lower-Limb Joint Moments during Sit-to-Stand

Content Provider	MDPI
Author	Hwang, Seoyoon Choi, Seo Young Lee, Yang-Soo Kim, Jonghyun
Copyright Year	2021
Description	To provide effective diagnosis and rehabilitation, the evaluation of joint moments during sit-to-stand is essential. The conventional systems for the evaluation, which use motion capture cameras, are quite accurate. However, the systems are not widely used in clinics due to their high cost, inconvenience, and the fact they require lots of space. To solve these problems, some studies have attempted to use inertial sensors only, but they were still inconvenient and inaccurate with asymmetric weight-bearing. We propose a novel joint moment estimation system that can evaluate both symmetric and asymmetric sit-to-stands. To make a simplified system, the proposal is based on a kinematic model that estimates segment angles using a single inertial sensor attached to the shank and a force plate. The system was evaluated with 16 healthy people through symmetric and asymmetric weight-bearing sit-to-stand. The results showed that the proposed system (1) has good accuracy in estimating joint moments (root mean square error < 0.110 Nm/kg) with high correlation (correlation coefficient > 0.99) and (2) is clinically relevant due to its simplicity and applicability of asymmetric sit-to-stand.
Starting Page	521
e-ISSN	14248220
DOI	10.3390/s21020521
Journal	Sensors
Issue Number	2
Volume Number	21
Language	English
Publisher	MDPI
Publisher Date	2021-01-13
Access Restriction	Open
Subject Keyword	Sensors Asymmetric Weight-bearing Motion Inertial Sensor Joint Moment Kinematic Model Segment Angle Sit-to-stand
Content Type	Text
Resource Type	Article

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