安静及暴露于有节奏的声学刺激下进行自主身体摆动时惯性传感测量的同时效度：一项初步研究。
Concurrent Validity of Inertially Sensed Measures during Voluntary Body Sway in Silence and while Exposed to a Rhythmic Acoustic Stimulus: A Pilot Study.
作者信息
Emmanouil Analina, Rousanoglou Elissavet, Georgaki Anastasia, Boudolos Konstantinos
机构信息
Sports Biomechanics Lab, Department of Sport Medicine and Biology of Exercise, School of Physical Education and Sport Science, National and Kapodistrian University of Athens, Athens, Greece.
Laboratory of Music Acoustics and Technology, Department of Music Studies, National and Kapodistrian University of Athens, Athens, Greece.
出版信息
Digit Biomark. 2021 Mar 23;5(1):65-73. doi: 10.1159/000514325. eCollection 2021 Jan-Apr.
INTRODUCTION
The effect of rhythmic acoustic stimuli on body sway is of increasing interest due to their positive contribution when training or restoring the control of movement. Inertial sensors show promise as a portable, easier, and more affordable method compared to the force plate "gold standard" concerning the evaluation of postural sway. This study examined the concurrent validity of inertially sensed measures of voluntary body sway against those obtained with a force plate, in silence and while exposed to a rhythmic acoustic stimulus.
METHODS
Temporal (sway duration and variability) and spatial (trajectory length, variability, range, velocity, and area) body sway variables were extracted using an inertial sensor (at L5) in synchronization with a force plate, during anteroposterior body sway in silence and while exposed to a rhythmic acoustic stimulus ( = 18 young women; two 70-s trials in each condition). Statistics included bivariate correlations between the inertially sensed and the force plate measures, separately, in silence and with a rhythmic acoustic stimulus, as well as for the effect of the rhythmic acoustic stimulus (percentage difference from silence) ( ≤ 0.05, SPSS v25.0).
RESULTS
The inertially sensed measures demonstrated good-to-excellent concurrent validity for all temporal and almost all spatial variables, both in silence and with rhythmic acoustic stimulus ( > 0.75, = 0.000), as well as for the rhythmic acoustic-stimulus effect ( > 0.75, ≤ 0.05).
CONCLUSION
The inertially sensed measures of the voluntary anteroposterior body sway demonstrated an overall good-to-excellent concurrent validity against those obtained with the force plate "gold standard," both in the silence and the rhythmic acoustic stimulus conditions, as well as for the rhythmic acoustic-stimulus effect. The findings of this pilot study allow the recommendation of inertial sensing for the evaluation of postural control alterations when exposed to rhythmic acoustic stimuli, a condition of increasing interest due to the positive contribution of such stimuli when training or restoring the control of movement.
引言
由于节奏性听觉刺激在训练或恢复运动控制方面具有积极作用，其对身体摇摆的影响越来越受到关注。与用于评估姿势摇摆的“金标准”测力台相比，惯性传感器作为一种便携、更简便且更经济的方法显示出了潜力。本研究考察了在安静状态下以及暴露于节奏性听觉刺激时，惯性传感器测量的自愿性身体摇摆与测力台测量结果的同时效度。
方法
在安静状态下以及暴露于节奏性听觉刺激时（n = 18名年轻女性；每种条件下进行两次70秒的试验），使用惯性传感器（位于L5）与测力台同步，提取前后方向身体摇摆的时间（摇摆持续时间和变异性）和空间（轨迹长度、变异性、范围、速度和面积）身体摇摆变量。统计分析包括分别在安静状态下和有节奏性听觉刺激时，惯性传感器测量值与测力台测量值之间的双变量相关性，以及节奏性听觉刺激的效应（与安静状态相比的百分比差异）（α ≤ 0.05，SPSS v25.0）。
结果
无论是在安静状态下还是有节奏性听觉刺激时，惯性传感器测量值对于所有时间变量以及几乎所有空间变量都显示出良好到优秀的同时效度（r > 0.75，p = 0.000），对于节奏性听觉刺激的效应也是如此（r > 0.75，p ≤ 0.05）。
结论
在安静状态和节奏性听觉刺激条件下，以及对于节奏性听觉刺激的效应，惯性传感器测量的自愿性前后方向身体摇摆与测力台“金标准”测量结果相比，总体显示出良好到优秀的同时效度。这项初步研究的结果使得可以推荐使用惯性传感来评估暴露于节奏性听觉刺激时的姿势控制改变，由于此类刺激在训练或恢复运动控制方面的积极作用，这一情况越来越受到关注。
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