背景:感知不稳定是慢性踝关节不稳定患者的主要症状。然而,着陆过程中关节运动学之间的关系尚不清楚。因此,我们调查了慢性踝关节不稳定患者的着陆运动学与感知不稳定之间的关系。
方法:在32例慢性踝关节不稳患者中,我们记录了脚踝,膝盖,和髋关节角度在单腿降落。使用两种方法将初始接触之前和之后的200毫秒期间的关节角度波形总结为单个值:峰值关节角度和通过主成分分析的主成分得分。使用Spearman的秩相关系数(ρ),我们检查了峰值关节角度和主成分得分与坎伯兰踝关节不稳定工具得分的关系,较低的分数表示更大的感知不稳定性(α=0.05)。
结果:水平和矢状面的踝部角度第二主成分得分与坎伯兰踝关节不稳定工具得分显著相关(水平:ρ=0.507,P=0.003;矢状面:ρ=-0.359,P=0.044)。这些分数表明着陆前后角度大小的差异。显着的相关性表明,较大的感知不稳定性与着陆前较小的内部旋转和pi屈以及着陆后较小的外部旋转和背屈相关。相比之下,无峰值关节角度与坎伯兰踝关节不稳定工具评分相关(P>0.05)。
结论:在慢性踝关节不稳患者中,着陆过程中踝关节运动与感觉不稳定相关可能是着陆前的保护策略,并可能导致着陆后踝关节不稳定。
BACKGROUND: Perceived instability is a primary symptom among individuals with chronic ankle instability. However, the relationship between joint kinematics during landing remains unclear. Therefore, we investigated the relationships between landing kinematics and perceived instability in individuals with chronic ankle instability.
METHODS: In 32 individuals with chronic ankle instability, we recorded ankle, knee, and hip joint angles during a single-leg drop landing. Joint angle waveforms during 200 ms before and after initial contact were summarized into single values using two methods: peak joint angles and principal component scores via principal component analysis. Using Spearman\'s rank correlation coefficient (ρ), we examined the relationships of peak joint angles and principal component scores with the Cumberland Ankle Instability Tool score, with a lower score indicating a greater perceived instability (α = 0.05).
RESULTS: The second principal component scores of ankle angle in the horizontal and sagittal planes significantly correlated with the Cumberland Ankle Instability Tool score (Horizontal: ρ = 0.507, P = 0.003; Sagittal: ρ = -0.359, P = 0.044). These scores indicated the differences in the magnitude of angles before and after landing. Significant correlations indicated a greater perceived instability correlated with smaller internal rotation and plantarflexion before landing and smaller external rotation and dorsiflexion after landing. In contrast, no peak joint angles correlated with the Cumberland Ankle Instability Tool score (P > 0.05).
CONCLUSIONS: In individuals with chronic ankle instability, ankle movements during landing associated with perceived instability may be a protective strategy before landing and potentially cause ankle instability after landing.