Quantifying foot deformation using finite helical angle

摘要: Foot intrinsic motion originates from the combination of numerous joint motions giving this segment a high adaptive ability. Existing foot kinematic models are mostly focused on analyzing small scale bone to which require both complex experimental methodology and interpretative work assess global functionality. This study proposes method total deformation by calculating helical angle relative rearfoot forefoot. required limited number retro-reflective markers placed was tested for five different movements (walking, forefoot impact running, heel 90° cutting, 180° U-turn) 12 participants. Overtime intraclass correlation coefficients were calculated quantify pattern repeatability each movement. Our results indicated that suitable identify as amplitudes observed according flexibility in Moreover, showed could be used mastering well mastered movements. Together with existing methods, new protocol applied fully function sport or clinical contexts.