使用胫骨加速度计测量跑步时的地面反作用力：与测力台的可靠性和有效性比较。

Use of a tibial accelerometer to measure ground reaction force in running: A reliability and validity comparison with force plates.

作者信息

Raper Damian P, Witchalls Jeremy, Philips Elissa J, Knight Emma, Drew Michael K, Waddington Gordon

机构信息

Australian Institute of Sport, Discipline of Physical Therapies, Australia; University of Canberra, Discipline of Physiotherapy, University Drive, Australia; Geelong Cats Football Club, Department of Physiotherapy and Medicine, Kardinia Park, Australia.

University of Canberra, Discipline of Physiotherapy, University Drive, Australia; University of Canberra, Research Institute for Sport and Exercise, University Drive, Australia.

出版信息

J Sci Med Sport. 2018 Jan;21(1):84-88. doi: 10.1016/j.jsams.2017.06.010. Epub 2017 Jun 16.

DOI:10.1016/j.jsams.2017.06.010

PMID:28663135

Abstract

OBJECTIVES

The use of microsensor technologies to conduct research and implement interventions in sports and exercise medicine has increased recently. The objective of this paper was to determine the validity and reliability of the ViPerform as a measure of load compared to vertical ground reaction force (GRF) as measured by force plates.

DESIGN

Absolute reliability assessment, with concurrent validity.

METHODS

10 professional triathletes ran 10 trials over force plates with the ViPerform mounted on the mid portion of the medial tibia. Calculated vertical ground reaction force data from the ViPerform was matched to the same stride on the force plate. Bland-Altman (BA) plot of comparative measure of agreement was used to assess the relationship between the calculated load from the accelerometer and the force plates. Reliability was calculated by intra-class correlation coefficients (ICC) with 95% confidence intervals.

RESULTS

BA plot indicates minimal agreement between the measures derived from the force plate and ViPerform, with variation at an individual participant plot level. Reliability was excellent (ICC=0.877; 95% CI=0.825-0.917) in calculating the same vertical GRF in a repeated trial. Standard error of measure (SEM) equalled 99.83 units (95% CI=82.10-119.09), which, in turn, gave a minimum detectable change (MDC) value of 276.72 units (95% CI=227.32-330.07).

CONCLUSIONS

The ViPerform does not calculate absolute values of vertical GRF similar to those measured by a force plate. It does provide a valid and reliable calculation of an athlete's lower limb load at constant velocity.

摘要

目的

近年来，微传感器技术在运动与运动医学领域的研究及干预实施中的应用有所增加。本文旨在确定与测力台测量的垂直地面反作用力（GRF）相比，ViPerform作为负荷测量指标的有效性和可靠性。

设计

绝对可靠性评估，并进行同时效度评估。

方法

10名职业铁人三项运动员在测力台上进行10次跑步试验，将ViPerform安装在内侧胫骨中部。将ViPerform计算得出的垂直地面反作用力数据与测力台上同一跨步的数据进行匹配。采用Bland-Altman（BA）一致性比较测量图来评估加速度计计算得出的负荷与测力台之间的关系。通过组内相关系数（ICC）及95%置信区间计算可靠性。

结果

BA图表明，测力台和ViPerform得出的测量结果之间一致性极小，在个体参与者测量图水平上存在差异。在重复试验中计算相同垂直GRF时，可靠性极佳（ICC = 0.877；95% CI = 0.825 - 0.917）。测量标准误（SEM）等于99.83单位（95% CI = 82.10 - 119.09），相应地，最小可检测变化（MDC）值为276.72单位（95% CI = 227.32 - 330.07）。