SUMMARY
Objective. This study aimed to determine the intrasession reliability of nonlinear gait kinematic analysis under single and dual-task conditions in individuals with and without Functional ankle instability (FAI).
Methods. Individuals with FAI and healthy subjects completed a walking task on a treadmill, with or without performing an auditory Stroop task. The gait kinematic parameters, including the LyE of hip, knee, and ankle angles in three planes, were recorded. Cognitive task performance was analyzed using error ratio and average reaction time. The intraclass correlation coefficient (ICC) was utilized to determine the intrasession reliability of kinematic and cognitive outcome measures.
Results. ICCs for the FAI group in dual and single-task conditions ranged between 0.53 to 0.85 and 0.62 to 0.96, respectively. ICCs for healthy groups in dual and singletask conditions ranged between 0.47 to 0.89 and 0.86 to 0.95, respectively. Lower ICC values were mainly related to the hip and knee transverse planes ranging from 0.47 to 0.68. ICC values of the auditory Stroop task were higher in the reaction time variable (FAI (0.95), control (0.84)) than in the error ratio (FAI (-0.01), control (0.43)).
Conclusions. LyE of gait kinematics had moderate to very high reliability in participants with and without FAI in both single and dual-task conditions, and it might be helpful for clinical evaluation. The low intrasession reliability in hip and knee transverse planes must be interpreted cautiously.
Reliability of Nonlinear Kinematic Analysis in Patients with Functional Ankle Instability During Dual-Task Walking
Tina Banakheiri, Sedigheh Sadat Naimi, Zahra Ebrahimabadi, Mohammad Yousefi, Aliyeh Daryabor
Original Article, 335-343
Keywords: dual-task, Functional ankle instability, gait, kinematics, Lyapunov exponent, motion analysis, reliability,
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Reliability of Nonlinear Kinematic Analysis in Patients with Functional Ankle Instability During Dual-Task Walking
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