Daniela Colombini has a degree in Medicine with specialization in Occupational Medicine and in Health Statistics and Epidemiology; European Ergonomist. Since 1985, senior researcher at the Research Unit "Ergonomics of Posture and Movement”-Milan, where she developed methods for the analysis and evaluation of biomechanical overload. She is author of the OCRA method, (standard EN 1005- 5 and ISO 11228-3) and represents Italy in international commissions of CEN and ISO working on biomechanics. She is professor in Florence University and coordinator of sub-group of the Technical Committee on the Prevention of Musculoskeletal Disorders of International Ergonomics Association (IEA). She is founder and President of the EPM IES (International Ergonomics School of Posture and Movement). Enrico Occhipinti has a degree in medicine with postgraduate specialization in occupational medicine and health statistics at the University of Milano (Italy). He is a Certified European Ergonomist. He is professor at the School of Specialization in Occupational Medicine, University of Milano and Director of the Research Unit Ergonomics of Posture and Movement (EPM) at Fondazione Don Gnocchi ONLUS-Milano. He has devoted more than 30 years on ergonomic issues related to physical ergonomics and the prevention of work-related musculoskeletal disorders. He developed and coauthored the OCRA method. He has been coordinator (up to 2012) of the TC on WMSDs of the International Ergonomics Association (IEA) and represents Italy in international commissions of CEN and ISO working on biomechanics.