1. a Coronel Institute for Occupational and Environmental Health , AmCOGG Amsterdam Centre for Research into Health and Health Care, Academic Medical Centre/University of Amsterdam , P.O. box 22700, 1100 DE Amsterdam, The Netherlands
2. b Institute for Fundamental and Clinical Human Movement Sciences , Faculty of Human Movement Sciences, Vrije Universiteit Amsterdam , Van der Boechorststraat 9, 1081 BT Amsterdam, The Netherlands
3. c Man-Machine Systems & Control Group, Department of Mechanical Engineering , Delft University of Technology , Delft, The Netherlands