Background

Kinematic parameters of the trunk, pelvis and lower limbs are frequently associated with both running injuries and performance, and the target of clinical interventions. Currently there is limited evidence reporting the between-day repeatability of discrete kinematic parameters of the trunk, pelvis and lower limbs during treadmill running.

Research question

What is the between-day repeatability, standard error of measurement and minimal detectable change of discrete kinematic parameters of the trunk, pelvis and lower limbs during treadmill running?

Methods

16 healthy participants attended two kinematic data collection sessions two weeks apart. Three-dimensional kinematic data were collected while participants ran on a motorised treadmill at 3.2 m/s. The interclass correlation coefficient, standard error of measurement and minimal detectable change were calculated for discrete kinematic parameters at initial contact, toe off, peak angles and joint excursions during the stance phase of running.

Results

Good to excellent repeatability with low standard error of measurement and minimal detectable change values were observed for sagittal and frontal plane kinematics at initial contact (Range: ICC, 0.829−0.941; SEM, 0.6°- 2.6°; MDC, 1.5°- 7.2) and peak angles during stance (Range: ICC, 0.799 – 0.946; SEM, 0.6°- 2.6°; MDC, 1.7°- 7.1°). Peak transverse plane kinematics of the hip (ICC, 0.783; SEM, 3.2°; MDC, 8.7°) and knee (ICC, 0.739; SEM, 3°; MDC, 8.4°) demonstrated moderate between-day repeatability with large SEM and MDC values. Kinematics at toe off demonstrated the lowest ICC values and largest measurement errors of all parameters (Range: ICC, 0.109 – 0.900; SEM, 0.8°- 5.7°; MDC, 2.5°- 15.7°).

Significance

This is the first study detailing the measurement error and minimal detectable change for discrete kinematic parameters of the trunk and pelvis during treadmill running. The reported values may provide a useful reference point for future studies investigating between-day differences in running kinematics.

中文翻译：

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跑步机运行过程中离散运动学参数的日间重复性，标准测量误差和最小可检测变化

背景

躯干，骨盆和下肢的运动学参数通常与跑步伤害和运动表现相关，并且是临床干预的目标。当前，很少有证据报告跑步机运行期间躯干，骨盆和下肢离散运动学参数的日间重复性。

研究问题

在跑步机运行期间，白天的重复性，测量的标准误差以及躯干，骨盆和下肢离散运动学参数的最小可检测变化是多少？

方法

16名健康参与者相距两周参加了两次运动学数据收集会议。在参与者以3.2 m / s的速度在电动跑步机上跑步时，收集了三维运动学数据。计算了站姿阶段中初始接触，脚趾离开，峰值角度和关节偏移时离散运动学参数的组间相关系数，测量标准误差和最小可检测变化。

结果

良好至极好的可重复性，具有低标准测量误差，并且在初次接触时观察到矢状和额面运动学的最小变化值（范围：ICC，0.829-0.941； SEM，0.6°-2.6°； MDC，1.5°-7.2）姿态时的峰值角度（范围：ICC，0.799 – 0.946； SEM，0.6°-2.6°； MDC，1.7°-7.1°）。髋部（ICC，0.783; SEM，3.2°; MDC，8.7°）和膝部（ICC，0.739; SEM，3°; MDC，8.4°）的峰横平面运动学证明具有中等的日间重复性，且SEM和MDC较大价值观。脚趾运动学证明所有参数的最低ICC值和最大测量误差（范围：ICC，0.109-0.900； SEM，0.8°-5.7°； MDC，2.5°-15.7°）。

意义

这是第一项详细研究跑步机跑步过程中躯干和骨盆离散运动学参数的测量误差和最小可检测变化的研究。报告的值可能为将来的研究运动学中运动之间的日间差异提供有用的参考点。