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The Lower Limb Joints Test-retest Repeatability in the Sagittal, Frontal and Transverse Planes of Movement during Stair Ascent and Descent among Young, Healthy Individuals

Introduction: The repeatability of both kinetics and kinematics of the knee joint among healthy individuals has been evaluated previously with measurement error, hence, it was important to use the same previous method to evaluate the repeatability of the hip and ankle joints as well in the sagittal, frontal, and transverse planes among healthy individuals during stair climbing the force plates attached interlaced stairway. Methods: five males and five females (32.1 ± 6.8 years) participated in this study to climb three-step stair over two visits. Five good trials with complete threedimensional kinematics and kinetics data from each session were used in this study. Results: The Intraclass Correlation Coefficients (ICC’s) for the hip and ankle joints' were between 0.83-0.99 for kinetics, and between 0.86-0.99 for kinematics data among healthy individuals. Furthermore, the standard error of measurement was up to 2.5° and 0.3 Nm/kg, whereas the root mean square deviation was up to 3° and 0.25 Nm/kg. Conclusion:. This result could help researchers to have a baseline for future studies.

Author(s): Al-Fatafta HH, Liu AM, Hutchins SW, Jones RK

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