KINEMATIC SIMULATION OF HANDBALL THROWING

摘要

Kinematic simulation of sport movements can be considered as an investigation tool for sport scientists. Nevertheless, kinematic simulation needs the specification of joint trajectories. Those trajectories can be modelled by control points and intermediate values can be computed with splines. So, a preliminary biomechanical analysis is required to model sport movements and especially to obtain the required control points. In addition to these control points, one has to define how the motion changes according to the situation, to consider these changes as inputs of the model. In handball throwing, one has to consider trajectories for all the joints and a set of operators that can adapt these control points to the situation: direction of the throw, ball speed, actions of opponents... The proposal of this study is to establish a model of handball throwing that could be adaptable to a maximum number of parameters, such as time of ball release, wrist position at ball release and throw type. The comparison of original joint trajectories obtained by motion capture with those obtained with such a model is encouraging. Moreover, the modification of an original movement produced trajectories that are closed to those obtained on real subjects placed in a similar situation. So, according to our results, this method looks promising to propose handball throwing simulations to sport scientists, even if only kinematics is considered.