Department of Sport, Exercise and Rehabilitation, Northumbria University, Newcastle upon Tyne, United Kingdom.
DANU Sports Ltd, Dublin, Ireland.
Physiol Meas. 2023 Nov 6;44(11). doi: 10.1088/1361-6579/ad04b4.
. Gait assessments have traditionally been analysed in laboratory settings, but this may not reflect natural gait. Wearable technology may offer an alternative due to its versatility. The purpose of the study was to establish the validity and reliability of temporal gait outcomes calculated by the DANU sports system, against a 3D motion capture reference system.. Forty-one healthy adults (26 M, 15 F, age 36.4 ± 11.8 years) completed a series of overground walking and jogging trials and 60 s treadmill walking and running trials at various speeds (8-14 km hr), participants returned for a second testing session to repeat the same testing.. For validity, 1406 steps and 613 trials during overground and across all treadmill trials were analysed respectively. Temporal outcomes generated by the DANU sports system included ground contact time, swing time and stride time all demonstrated excellent agreement compared to the laboratory reference (intraclass correlation coefficient (ICC) > 0.900), aside from ground contact time during overground jogging which had good agreement (ICC = 0.778). For reliability, 666 overground and 511 treadmill trials across all speeds were examined. Test re-test agreement was excellent for all outcomes across treadmill trials (ICC > 0.900), except for swing time during treadmill walking which had good agreement (ICC = 0.886). Overground trials demonstrated moderate to good test re-test agreement (ICC = 0.672-0.750), which may be due to inherent variability of self-selected (rather than treadmill set) pacing between sessions.. Overall, this study showed that temporal gait outcomes from the DANU Sports System had good to excellent validity and moderate to excellent reliability in healthy adults compared to an established laboratory reference.
. 传统上，步态评估是在实验室环境中进行的，但这可能无法反映自然步态。可穿戴技术因其多功能性可能提供一种替代方法。本研究的目的是确定 DANU 运动系统计算的时间步态结果与 3D 运动捕捉参考系统相比的有效性和可靠性。. 41 名健康成年人（26 名男性，15 名女性，年龄 36.4±11.8 岁）完成了一系列地面行走和慢跑试验以及 60 秒跑步机行走和跑步试验，速度为 8-14 公里/小时，参与者返回第二次测试以重复相同的测试。. 为了验证有效性，分析了地面和所有跑步机试验中分别有 1406 步和 613 次试验的时间结果。DANU 运动系统生成的时间结果包括地面接触时间、摆动时间和步幅时间，与实验室参考值（组内相关系数（ICC）>0.900）相比均具有极好的一致性，除了地面接触时间在地面慢跑时具有良好的一致性（ICC=0.778）。为了评估可靠性，检查了所有速度下的 666 个地面和 511 个跑步机试验。除了跑步机行走时的摆动时间具有良好的一致性（ICC=0.886）外，所有试验的测试-再测试一致性都非常好（ICC>0.900）。地面试验表现出中度到极好的测试-再测试一致性（ICC=0.672-0.750），这可能是由于两次试验之间固有选择（而不是跑步机设置）的节奏变化所致。. 总体而言，与既定的实验室参考相比，本研究表明，DANU Sports System 的时间步态结果在健康成年人中具有良好到极好的有效性和中度到极好的可靠性。
