Results: Maximum (coronal plane) abduction (118° ± 16°) and (sagittal plane) flexion (111° ± 15°) was observed during 'washing one's hair ' maximum extension (-68° ± 9°) was identified during 'washing one's own back.' Minimum shoulder ROM was observed during 'opening a tight jar' (33° ± 13° abduction and 13° ± 19° flexion). Test-retest and inter-rater reliability of the measurements were evaluated using intraclass correlation coefficients (ICC). The tracking tool of the Dartfish software was used to obtain shoulder joint angles and arcs of motion. Shoulder movements from all three repetitions were analyzed using Dartfish software. Three repetitions of each task were performed. Video cameras and markers were used to obtain video images suitable for analysis in Dartfish software. Materials and Methods: Ten healthy participants, mean age 29 ± 5 years, were videotaped while performing five tasks selected from the Disabilities of the Arm, Shoulder and Hand (DASH). A second purpose was to assess the reliability of functional ROM measurements obtained by different raters using Dartfish software. The primary purpose of this study was to describe the functional range of motion (ROM) of the shoulder used to perform a subset of functional tasks. Purpose: Video-based movement analysis software (Dartfish) has potential for clinical applications for understanding shoulder motion if functional measures can be reliably obtained. An analysis of functional shoulder movements during task performance using Dartfish movement analysis software

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