On the way to a generalized discomfort model for movements steps are presented that calculate the determining parameters for the model. Discomfort is mainly dependant on posture and relative torque. A multi body system arm model is used to calculate the driving torques of a lifting task using inverse dynamics. A motion analysis of the movement was carried out and the corresponding angles were used to drive the arm model. In order to calculate relative torque a torque velocity relationship according to Hill was implemented in the arm model.