title: A note on the determination of angular velocities in human motion studies.
abstract: Often the study of sports activities involves a reduction of film data to determine displacements, rotations, velocities and accelerations. Many researchers use the change in position of the projection of a body segment onto a plane of interest (usually the film plane) to determine the component of angular velocity in the plane. This techanical note illustrates that the determination of angular velocity components in this manner leads to erroneous values except in some special cases.
mesh_terms: D001696:Biomechanical Phenomena; D006801:Humans; D008433:Mathematics; D009038:Motion; D012399:Rotation; D013177:Sports