@book{KellerRotherBartkowiaketal.2018,
  author    = {Keller, Henry and Rother, Philipp and Bartkowiak, Michael and Rauch, Sebastian and Zehl, Rebecca and Ballentin, Josefine and K{\"a}hler, Claudia and Appelt, Franziska and Kochan, Robert and Pfitzner, Tom and Rogge, Lisa and Kurth, Anne-Kathrin and Hiller, Chris},
  title     = {Geographien des Fußballs},
  editor    = {Wilhelm, Jan Lorenz},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  isbn      = {978-3-86956-416-6},
  issn      = {2194-1599},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-401497},
  publisher      = {Universit{\"a}t Potsdam},
  pages     = {231},
  year      = {2018},
  abstract  = {In Deutschland erscheint Fußball als omnipr{\"a}sent: Fußballprofis gelten als Vorbilder und Werbetr{\"a}ger, Fußballvereine fungieren als regionale und teilweise als globale Wirtschaftsunternehmen, Fußballspiele als gesellschaftliche Ereignisse und Fußballmannschaften - sowohl auf regionaler als auch auf nationaler Ebene - als identit{\"a}tsstiftend. Unbestritten weist das Ph{\"a}nomen Fußball eine große Gesellschaftsrelevanz auf, und so verwundert es nicht, dass es als Gegenstand wissenschaftlicher und eben auch geographischer Abhandlungen fungiert. Der vorliegende Band richtet sich nun an Geographiestudenten und Fußballinteressierte, die sich verwundert fragen m{\"o}gen, was Geographien des Fußballs bedeuten k{\"o}nnte. Der Band veranschaulicht exemplarisch, was geographische Perspektiven auf den Forschungsgegenstand Fußball auszeichnen und welche Themenfelder und Fragestellungen sich f{\"u}r eine Erforschung anbieten. Dabei reicht das in diesem Band vorgestellte Themenspektrum von raumbezogenen Sprachcodierungen in Spielanalysen {\"u}ber Stadionatmosph{\"a}re und Fanidentit{\"a}ten bis hin zu medial erzeugten Unsicherheitsr{\"a}umen.},
  language  = {de}
}
@phdthesis{Negri2014,
  author    = {Negri, Michael},
  title     = {How coaches influence referee decisions},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-72247},
  school      = {Universit{\"a}t Potsdam},
  pages     = {132},
  year      = {2014},
  abstract  = {The work elaborates on the question if coaches in non-professional soccer can influence referee decisions. Modeled from a principal-agent perspective, the managing referee boards can be seen as the principal. They aim at facilitating a fair competition which is in accordance with the existing rules and regulations. In doing so, the referees are assigned as impartial agents on the pitch. The coaches take over a non-legitimate principal-like role trying to influence the referees even though they do not have the formal right to do so. Separate questionnaires were set up for referees and coaches. The coach questionnaire aimed at identifying the extent and the forms of influencing attempts by coaches. The referee questionnaire tried to elaborate on the questions if referees take notice of possible influencing attempts and how they react accordingly. The results were put into relation with official match data in order to identify significant influences on personal sanctions (yellow cards, second yellow cards, red cards) and the match result. It is found that there is a slight effect on the referee's decisions. However, this effect is rather disadvantageous for the influencing coach and there is no evidence for an impact on the match result itself.},
  language  = {en}
}
@misc{PrieskeMaffiulettiGranacher2018,
  author    = {Prieske, Olaf and Maffiuletti, Nicola A. and Granacher, Urs},
  title     = {Postactivation Potentiation of the Plantar Flexors Does Not Directly Translate to Jump Performance in Female Elite Young Soccer Players},
  series = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe},
  journal   = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe},
  number    = {483},
  issn      = {1866-8364},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-420558},
  pages     = {10},
  year      = {2018},
  abstract  = {Background: Infection with human immunodeficiency virus (HIV) affects muscle mass, altering independent activities of people living with HIV (PLWH). Resistance training alone (RT) or combined with aerobic exercise (AE) is linked to improved muscle mass and strength maintenance in PLWH. These exercise benefits have been the focus of different meta-analyses, although only a limited number of studies have been identified up to the year 2013/4. An up-to-date systematic review and meta-analysis concerning the effect of RT alone or combined with AE on strength parameters and hormones is of high value, since more and recent studies dealing with these types of exercise in PLWH have been published. Methods: Randomized controlled trials evaluating the effects of RT alone, AE alone or the combination of both (AERT) on PLWH was performed through five web-databases up to December 2017. Risk of bias and study quality was attained using the PEDro scale. Weighted mean difference (WMD) from baseline to post-intervention changes was calculated. The I2 statistics for heterogeneity was calculated. Results: Thirteen studies reported strength outcomes. Eight studies presented a low risk of bias. The overall change in upper body strength was 19.3 Kg (95\% CI: 9.8±28.8, p< 0.001) after AERT and 17.5 Kg (95\% CI: 16±19.1, p< 0.001) for RT. Lower body change was 29.4 Kg (95\% CI: 18.1±40.8, p< 0.001) after RT and 10.2 Kg (95\% CI: 6.7±13.8, p< 0.001) for AERT. Changes were higher after controlling for the risk of bias in upper and lower body strength and for supervised exercise in lower body strength. A significant change towards lower levels of IL-6 was found (-2.4 ng/dl (95\% CI: -2.6, -2.1, p< 0.001). Conclusion: Both resistance training alone and combined with aerobic exercise showed a positive change when studies with low risk of bias and professional supervision were analyzed, improving upper and, more critically, lower body muscle strength. Also, this study found that exercise had a lowering effect on IL-6 levels in PLWH.},
  language  = {en}
}