PMID: 28515970May 19, 2017Paper

TWO-DIMENSIONAL VIDEO ANALYSIS IS COMPARABLE TO 3D MOTION CAPTURE IN LOWER EXTREMITY MOVEMENT ASSESSMENT

International Journal of Sports Physical Therapy
Stacy A SchurrSusan A Saliba

Abstract

Although 3D motion capture is considered the "gold standard" for recording and analyzing kinematics, 2D video analysis may be a more reasonable, inexpensive, and portable option for kinematic assessment during pre-participation screenings. Few studies have compared quantitative measurements of lower extremity functional tasks between 2D and 3D. To compare kinematic measurements of the trunk and lower extremity in the frontal and sagittal planes between 2D video camera and 3D motion capture analyses obtained concurrently during a SLS. Descriptive laboratory study. Twenty-six healthy, recreationally active adults volunteered to participate. Participants performed three trials of the single leg squat on each limb, which were recorded simultaneously by three 2D video cameras and a 3D motion capture system. Dependent variables analyzed were joint displacement at the trunk, hip, knee, and ankle in the frontal and sagittal planes during the task compared to single leg quiet standing. Dependent variables exhibited moderate to strong correlations between the two measures in the sagittal plane (r = 0.51-.093), and a poor correlation at the knee in the frontal plane (r = 0.308) at (p ≤ 0.05) All other dependent variables revealed non-sign...Continue Reading

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