Ekdahl Mitchell, Ulman Sophia, Butler Lauren
Scottish Rite for Children, Frisco, TX 75034, USA.
Department of Orthopaed Surgery, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
Sensors (Basel). 2024 Feb 23;24(5):1454. doi: 10.3390/s24051454.
The knee abduction moment (KAM) has been identified as a significant predictor of anterior cruciate ligament (ACL) injury risk; however, the cost and time demands associated with collecting three-dimensional (3D) kinetic data have prompted the need for alternative solutions. Wearable inertial measurement units (IMUs) have been explored as a potential solution for quantitative on-field assessment of injury risk. Most previous work has focused on angular velocity data, which are highly susceptible to bias and noise relative to acceleration data. The purpose of this pilot study was to assess the relationship between KAM and body segment acceleration during sport-specific movements. Three functional tasks were selected to analyze peak KAM using optical motion capture and force plates as well as peak triaxial segment accelerations using IMUs. Moderate correlations with peak KAM were observed for peak shank acceleration during single-leg hop; peak trunk, thigh, and shank accelerations during a deceleration task; and peak trunk, pelvis, and shank accelerations during a 45° cut. These findings provide preliminary support for the use of wearable IMUs to identify peak KAM during athletic tasks.
膝关节外展力矩（KAM）已被确定为前交叉韧带（ACL）损伤风险的重要预测指标；然而，收集三维（3D）动力学数据所涉及的成本和时间需求促使人们寻求替代解决方案。可穿戴惯性测量单元（IMU）已被探索作为一种潜在的解决方案，用于在现场对损伤风险进行定量评估。此前的大多数工作都集中在角速度数据上，相对于加速度数据，角速度数据极易受到偏差和噪声的影响。这项初步研究的目的是评估在特定运动动作中KAM与身体节段加速度之间的关系。选择了三项功能任务，使用光学动作捕捉和测力板分析KAM峰值，同时使用IMU分析三轴节段加速度峰值。在单腿跳跃过程中，观察到小腿加速度峰值与KAM峰值存在中度相关性；在减速任务中，观察到躯干、大腿和小腿加速度峰值与KAM峰值存在中度相关性；在45°变向动作中，观察到躯干、骨盆和小腿加速度峰值与KAM峰值存在中度相关性。这些发现为使用可穿戴IMU识别运动任务期间的KAM峰值提供了初步支持。
