a Department of Physical Education, Sport and Human Movement , Universidad Autónoma de Madrid , Madrid , Spain.
b Laboratory of Exercise Physiology Research Group, Department of Health and Human Performance, School of Physical Activity and Sport Sciences-INEF , Universidad Politécnica de Madrid , Madrid , Spain.
J Sports Sci. 2019 Feb;37(3):249-253. doi: 10.1080/02640414.2018.1494908. Epub 2018 Jul 2.
The purpose of this investigation was to analyze the validity and reliability of an iPhone app (named: Dorsiflex) for the measurement of weight-bearing ankle dorsiflexion. To do this, twelve healthy participants (age=28.6±2.3 years) performed a weight-bearing lunge test with each leg in five separate occasions, while dorsiflexion angle was simultaneously registered using a professional digital inclinometer and the Dorsiflex iPhone app, which was specifically developed for this study. A total of 120 angles measured both with the digital inclinometer and the app were then compared for validity, reliability and accuracy purposes using several statistical tests. There was an almost perfect correlation between the digital inclinometer and the Dorsiflex app for the measurement of ankle dorsiflexion (r=0.989, 95% CI=0.986-0.993, SEE=0.48º), with trivial, non-significant differences between devices (SMD=0.17, p=0.10). When analyzing the reliability of the app for the measurement of five different trials for each participant, similar coefficients of variation (CV) were observed in comparison with those obtained with the digital inclinometer (Dorsiflex app: CV=5.1±2.3 %; Digital inclinometer: CV=4.9±2.5 %). The results of the present study show that weight-bearing ankle dorsiflexion can be easily, accurately, and reliably evaluated using the Dorsiflex iPhone app.
本研究旨在分析一款用于测量负重踝关节背屈的 iPhone 应用程序（名为 Dorsiflex）的有效性和可靠性。为此，12 名健康参与者（年龄=28.6±2.3 岁）在五个不同的场合分别用每条腿进行负重前弓步测试，同时使用专业的数字倾角计和专门为本研究开发的 Dorsiflex iPhone 应用程序同时记录背屈角度。总共测量了 120 个角度，然后使用多种统计测试比较数字倾角计和应用程序的有效性、可靠性和准确性。数字倾角计和 Dorsiflex 应用程序之间的测量结果具有非常高的相关性（r=0.989，95%CI=0.986-0.993，SEE=0.48°），两个设备之间存在微小、无统计学意义的差异（SMD=0.17，p=0.10）。当分析应用程序在每个参与者的五次不同试验中的可靠性时，与数字倾角计相比，观察到相似的变异系数（CV）（Dorsiflex 应用程序：CV=5.1±2.3%；数字倾角计：CV=4.9±2.5%）。本研究的结果表明，使用 Dorsiflex iPhone 应用程序可以轻松、准确、可靠地评估负重踝关节背屈。
