基于传感器的惯性测量单元和运动捕捉系统评估老年人下肢肌肉力量的准确性验证——一种新颖、便捷的测量方法。

Accuracy Validation of a Sensor-Based Inertial Measurement Unit and Motion Capture System for Assessment of Lower Limb Muscle Strength in Older Adults-A Novel and Convenient Measurement Approach.

机构信息

School of Exercise and Health, Shanghai University of Sport, Shanghai 200438, China.

Chongming Hospital Affiliated to Shanghai University of Medicine and Health Sciences, Shanghai 202150, China.

出版信息

Sensors (Basel). 2024 Sep 18;24(18):6040. doi: 10.3390/s24186040.

DOI:10.3390/s24186040

PMID:39338786

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11435846/

Abstract

(1) Background: The aim of this study was to assess lower limb muscle strength in older adults during the transfer from sitting to standing (STS) using an inertial measurement unit (IMU). Muscle weakness in this population can severely impact function and independence in daily living and increase the risk of falls. By using an IMU, we quantified lower limb joint moments in the STS test to support health management and individualized rehabilitation program development for older adults. (2) Methods: This study involved 28 healthy older adults (13 males and 15 females) aged 60-70 years. The lower limb joint angles and moments estimated using the IMU were compared with a motion capture system (Mocap) (pair -test, ICC, Spearman correlations, Bland-Altman plots) to verify the accuracy of the IMU in estimating lower limb muscle strength in the elderly. (3) Results: There was no significant difference in the lower limb joint angles and moments calculated by the two systems. Joint angles and moments were not significantly different (p > 0.05), and the accuracy and consistency of the IMU system was comparable to that of the Mocap system. For the hip, knee, and ankle joints, the ICCs for joint angles were 0.990, 0.989, and 0.885, and the ICCs for joint moments were 0.94, 0.92, and 0.89, respectively. In addition, the results of the two systems were highly correlated with each other: the r-values for hip, knee, and ankle joint angles were 0.99, 0.99, and 0.96, and the r-values for joint moments were 0.92, 0.96, and 0.85. In the present study, there was no significant difference ( > 0.05) between the IMU system and the Mocap system in calculating lower limb joint angles and moments. (4) Conclusions: This study confirms the accuracy of the IMU in assessing lower limb muscle strength in the elderly. It provides a portable and accurate alternative for the assessment of lower limb muscle strength in the elderly.

摘要

（1）背景：本研究旨在使用惯性测量单元（IMU）评估老年人从坐姿到站立（STS）过程中的下肢肌肉力量。该人群的肌肉无力会严重影响日常活动中的功能和独立性，并增加跌倒的风险。通过使用 IMU，我们在 STS 测试中量化了下肢关节力矩，以支持老年人的健康管理和个性化康复计划的制定。（2）方法：本研究纳入了 28 名健康的 60-70 岁老年人（男性 13 名，女性 15 名）。使用 IMU 估计的下肢关节角度和力矩与运动捕捉系统（Mocap）进行了比较（配对检验，ICC，Spearman 相关，Bland-Altman 图），以验证 IMU 在估计老年人下肢肌肉力量方面的准确性。（3）结果：两种系统计算得到的下肢关节角度和力矩无显著差异。关节角度和力矩无显著差异（p＞0.05），IMU 系统的准确性和一致性与 Mocap 系统相当。对于髋关节、膝关节和踝关节，关节角度的 ICC 分别为 0.990、0.989 和 0.885，关节力矩的 ICC 分别为 0.94、0.92 和 0.89。此外，两种系统的结果高度相关：髋关节、膝关节和踝关节角度的 r 值分别为 0.99、0.99 和 0.96，关节力矩的 r 值分别为 0.92、0.96 和 0.85。在本研究中，IMU 系统和 Mocap 系统在计算下肢关节角度和力矩方面无显著差异（＞0.05）。（4）结论：本研究证实了 IMU 评估老年人下肢肌肉力量的准确性。它为评估老年人下肢肌肉力量提供了一种便携且准确的替代方法。