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Objective: To validate the use of a 2-dimensional video based system (Hu-m-an digitizing software, HMA Technology Inc. Ontario, Canada), for measuring sagital plane knee and ankle angles during gait analysis. Design: Criterion-based, concurrent validation. Participants: 18 persons without any gait disorders. Method: The participants were subjected to simultaneous capture of their motion data with a digital video camera filming in the sagital plane only, and a 3-dimensional optoelectronic motion capture system (Qualisys Medical AB, Gothenburg, Sweden). The data was analyzed both using Hu-m-an digitizing software (HMA Technology Inc. Ontario, Canada) and Visual 3D (C-motion Inc., Kingston, Canada) respectively. Outcome: Relative angles for the knee and ankle. Results: Significant difference was found between the systems for measuring ankle angles (p |
