Inducing a systematic perturbation forces on the hand during arm reaching movement may improve adaptation. Error-augmentation (EA) training is relatively new concept in motor learning intended to promote the adaptation process. In this study participants will practice one session of training on 3D robotic device. Healthy volunteers will be randomly divided into two groups: study and control. The study group will carry out the training session with EA forces. The control group will carry out the same procedure with null force field. Outcome measure are the average size of trajectory error from the straight line and level of exertion (borg scale).