Biomechanical measures are the gold standard in the assessment of gait in healthy and chronic disease populations. Augmented reality (AR) systems represent an opportunity to evaluate human movement under more realistic and interactive conditions. A barrier to integrating AR into healthcare is the unknown accuracy of systems in the quantification of human movement. This project aimed to determine the accuracy of the HoloLens relative to three-dimensional motion capture (MoCap) in quantifying gait. Ten healthy adults completed nine walking trials (n = 3 for slow, medium, and fast speed, respectively). Outcome measures included: cumulative walking distance, number of steps, step length, and speed. Statistical equivalence testing, using an a priori threshold of five percent, confirmed biomechanical measures derived from the HoloLens was equivalent to MoCap. Cumulative walking distance from the HoloLens was within 1.5–2.1% of the MoCap system for all walking speeds. Difference between systems in terms of movement accuracy was less than 3.7 cm across trials. Equivalence in outcomes makes the HoloLens appropriate for the quantification of frequently used gait variables to characterize walking performance. Future AR applications have the potential to deliver digital therapeutics to patient populations under more real-world conditions and monitor performance using objective and quantitative outcomes.

中文翻译：

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HoloLens 增强现实系统提供健康成人步态表现的有效测量

生物力学测量是评估健康和慢性疾病人群步态的金标准。增强现实 (AR) 系统代表了在更现实和交互式条件下评估人体运动的机会。将 AR 集成到医疗保健中的一个障碍是系统在人体运动量化方面的未知准确性。该项目旨在确定 HoloLens 相对于三维运动捕捉 (MoCap) 在量化步态方面的准确性。10 名健康成年人完成了 9 次步行试验（慢速、中速和快速分别为 n = 3）。结果测量包括：累计步行距离、步数、步长和速度。统计等效性检验，使用 5% 的先验阈值，来自 HoloLens 的经确认的生物力学测量相当于 MoCap。对于所有步行速度，从 HoloLens 的累积步行距离在 MoCap 系统的 1.5-2.1% 以内。在整个试验中，系统之间在运动精度方面的差异小于 3.7 厘米。结果的等效性使 HoloLens 适用于量化常用的步态变量来表征步行性能。未来的 AR 应用有可能在更真实的条件下为患者群体提供数字治疗，并使用客观和定量的结果来监控性能。结果的等效性使 HoloLens 适用于量化常用的步态变量来表征步行性能。未来的 AR 应用有可能在更真实的条件下向患者群体提供数字治疗，并使用客观和定量的结果来监控性能。结果的等效性使 HoloLens 适用于量化常用的步态变量来表征步行性能。未来的 AR 应用有可能在更真实的条件下为患者群体提供数字治疗，并使用客观和定量的结果来监控性能。