[Employees in professional European football: comparison of the personnel structure in sports medicine, sports sciences and physiotherapy between Bundesliga, La Liga, Serie A and Premier League].

Introduction: Regional and league-specific differences in injury risk and time loss have been observed in professional European football. Besides time of play or different pre-season preparations, possible reasons may also include medical and sport-scientific support. A survey of what UEFA deems to be the best four football clubs has therefore been conducted to investigate the personnel status in the fields of medicine, physiotherapy, massage, sports science and athletic and "strength and conditioning" coaching in order to compare the Erste Bundesliga with the first leagues of the other countries.

Methods: The study is based on a survey of all 78 teams in the highest football leagues of Germany (Bundesliga), Spain (La Liga), Italy (Serie A) and England (Premier League). The teams were contacted directly and a questionnaire concerning their personnel deployment in the different fields was handed out.

Results: The Bundesliga was found to have a significantly lower total number of employees compared with the other European leagues (6.9 vs. 11.02; p < 0.0001). The number of physicians in the Bundesliga is significantly higher (2.2 vs. 1.76; p = 0.0259), but the number of physicians dedicating more than 80 % of their total medical practice to the team was significantly lower in the Bundesliga (0.2 vs. 1.45; < 0.0001). In the group of physiotherapists (1.8 vs. 3.6; p < 0.001), massage therapists (2.1 vs. 2.69; p = 0.0094), sports scientists (0.3 vs. 1.12; p < 0.0001) and athletic and "strength and conditioning" coaches (0.5 vs. 1.83; p < 0.0001), there were also significant differences between the staff structure in the Bundesliga compared with the grouped results of the other leagues.

Conclusion: The personnel structure and the personnel employment in the Bundesliga in sports medicine and sports sciences differs significantly from La Liga, Serie A and the Premier League with the latter three leagues having more personnel and the personnel having closer ties to their teams. Further investigation is necessary to find out if this may be a reason for the differences in injury rates observed between these leagues. A special focus should be placed on country-specific differences in the professions including education and scope of work.