Effects of spinal coupling and marker set on tracking of spine models during running

This study aims to understand the influence of spine modelling and marker placement on the execution of the inverse kinematics (IK) process in OpenSim. IK adjusts the model at each time step best matching the marker data while remaining kinematically feasible, correcting for experimental error. Analysing running motions with different spine models and marker combinations show that the most effective model was the coupled spine model. The setup with the most amount of spine markers utilized was the most effective in reducing the root-mean-square error.