Objective: This systematic mixed study review, focuses on the use of observation methodology in elite men's football matches, which constitutes an innovative approach, that opens up a new panorama of useful and productive research.Method: The methods used in this study follow the recommendations for systematic reviews and meta-analysis guidelines (PRISMA). The search was carried out in five databases. Ninety-four articles out of 3,195 were selected and analyzed. In order to achieve a quality assessment, the guide was used to inform evaluations based on observation methodology (GREOM) (Portell et al., 2015), recognized by the EQUATOR network.Results: From the methodological review analysis, information obtained indicates that 97% of the researches used direct observation and 3% indirect observation. On the other hand, 56.5% of the articles explain the instrument used and 77% justify the applied observational design. A quantitative comparison of the proportions was made in several methodological aspects, which resulted in only 15.21% reviewing the quality of the data, and that 67.3% of the articles contributed to the mixed methods approach. The methodological review allowed us to establish procedural profiles. The results indicate that 67% of the articles have been published in English, and of these, 77% were published in journals that have an impact factor. The majority of the researchers, 53.26%, belong to Spanish entities. The most studied substantive aspects were goal (34%), possession of the ball (28%), and corner (27%). The most observed events were Leagues, World Cups, individual players and other events.Conclusions: The results obtained refer to both substantive and methodological aspects and allow us to configure a systematic review of mixed studies, in which we emphasize the aspects of a “systematic review” and a “mixed study,” within an integrated perspective.

RESUMEN Este estudio busca identificar la relación entre los factores psicosociales laborales y el

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Assessing all the factors relating to working conditions that may impact on health and quality of life at work for Auxiliary sterilization. We performed a cross-sectional analytical study, we applied the CVT-GOHISALO instrument, which measures quality of life at work and the overall evaluation method LEST ergonomic working conditions for the analysis of the data was used the statistical program SPSS 18 software and online work ergonomics of the Polytechnic University of Valencia. In dimension institutional support for work, sterilization assistants, displayed no opportunities for advancement in position or role in the security dimension at work, feel injustice in promotion opportunities within the institution, in the integration dimension to the job, are motivated to overcome challenges and very willing to be leaders in job satisfaction dimension, are usually committed to the mission of the institution, in the dimension of being achieved through work, they risk physical health and mental health, personal development dimension, are optimistic and friendly service, in free time management dimension, fully comply with your schedule and the tasks without compromising their personal and social commitments. The working conditions in terms of posture, handling surgical equipment and tools presents imminent risk of fatigue. The sterilization assistants show a series of subjective perceptions that reflect the reality of their work environment, which should lead to the leadership in decision making towards improving work processes and thus reduce the risk factors that are evident in this study, which may cause physical and mental illness if not corrected early.