Work-related musculoskeletal disorders, (MSDs, painful disorders of muscles, ligaments, joints and other body parts that integrate human body’s supporting system) are among the most common occupational diseases in the EU and the most important cause of long-term sickness absences. For this reason, MSDs are a priority in EU’s prevention strategy on OSH. MSDs’ prevention strategy can be addressed with appropriate physical activity (PA) programs. Several researches have proved the benefits of an active lifestyle, evidencing that some muscular injuries would be avoided by increasing muscle tone through adequate physical exercises. According to this, the EU PA Guidelines (2008) stated that if the work is monotonous or heavy … implies an increased risk of skeletal muscle disorders, employers and trade unions should include requirements for the workplace which facilitate (workers’) access to exercises specifically designed to counteract these diseases (guideline 33).One option for facilitating workers’ access to exercises is the implementation of fitness programs, specifically designed for attending muscular requirements related to worksite ergonomic risks. For this purpose ergonomics professionals have the right capabilities for determining the risks that workers have to face related to their workplace, but they fail in defining specific PA plans for reducing these risks. In this context, FitWork project aims in developing good practices to support ergonomics, health and safety professionals to implement PA programs designed by sport experts, addressed to reduce specific ergonomic risks at the workplace. For meeting this objective, ergonomics and sport professionals will work together for defining good practices in occupational risk prevention through PA, including motivational aspects.Five work packages are included in the project work plan. The first work package focused on the identification of best practices on workplace health promotion, carried out by companies. The gathered information in this work package facilitated the basis upon the project members built the Worksite Health Promotion (WHP) programs implemented during the pilot test. The second work package concentrated in defining sports programs, adapted to specific job demands. These programs definition required the identification of the MSDs caused by the most common risks or job demands at the worksite, which can be reduced through PA. This information was employed for defining fitness programs adapted to workers necessities, and WHP programs. These WHP programs included motivational aspects. The WHP programs defined in the precedent tasks were implemented and validated in a real environment (third work package). For this purpose, the WHP programs were adapted to the necessities of the participant companies in validation tasks. The risks and job demands of the different workplaces of these companies were evaluated, and specific fitness programs were arranged, selecting PA from those defined in previous tasks. Finally, a pilot test was performed in order to evaluate the WHP programs defined for every company. The fourth work package focused on analysing all the information generated during the pilot test execution. From this information we obtained the effect of the fitness programs implementation in worker’s health (real and perceived), and changes towards healthier life styles. This work package also included the tasks related to defining good practices for creating WHP programs to be implemented in manufacturing and service companies. Dissemination tasks in the fifth work package. In these tasks the consortium has disseminated the project results at an European level, in order to promote the implementation of WHP programs in companies, for preventing European workers from suffering MSDs. All the consortium members participated in these activities, addressing their national audiences for achieving a big dissemination's impact.