About the Authors

Svend Sparre Geertsen

ssgeertsen@nexs.ku.dk

Affiliations Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark, Department of Neuroscience and Pharmacology, University of Copenhagen, Copenhagen, Denmark, Copenhagen Centre for Team Sport and Health, University of Copenhagen, Copenhagen, Denmark

Richard Thomas

Affiliations Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark, Department of Neuroscience and Pharmacology, University of Copenhagen, Copenhagen, Denmark, Copenhagen Centre for Team Sport and Health, University of Copenhagen, Copenhagen, Denmark

Malte Nejst Larsen

Affiliations Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark, Copenhagen Centre for Team Sport and Health, University of Copenhagen, Copenhagen, Denmark

Ida Marie Dahn

Affiliation Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark

Josefine Needham Andersen

Affiliation Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark

Matilde Krause-Jensen

Affiliation Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark

Vibeke Korup

Affiliation Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark

Claus Malta Nielsen

Affiliations Copenhagen Centre for Team Sport and Health, University of Copenhagen, Copenhagen, Denmark, Frederikssund Municipality, Frederikssund, Denmark

Jacob Wienecke

Affiliations Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark, Department of Neuroscience and Pharmacology, University of Copenhagen, Copenhagen, Denmark

Christian Ritz

Affiliation Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark

Peter Krustrup

Affiliations Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark, Copenhagen Centre for Team Sport and Health, University of Copenhagen, Copenhagen, Denmark, Sport and Health Sciences, College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom

Jesper Lundbye-Jensen

Affiliations Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark, Department of Neuroscience and Pharmacology, University of Copenhagen, Copenhagen, Denmark, Copenhagen Centre for Team Sport and Health, University of Copenhagen, Copenhagen, Denmark

Competing Interests

The research grants received from the FIFA Medical Assessment and Research Centre (F-MARC) and the Danish Football Association (DBU) does not alter our adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceptualization: SSG RT JW PK JLJ. Formal analysis: SSG IMD JNA MKJ CR JLJ. Funding acquisition: JLJ SSG MNL PK. Investigation: SSG RT MNL IMD JNA MKJ VK CMN JLJ. Project administration: SSG MNL. Writing – original draft: SSG CR JLJ. Writing – review & editing: SSG RT MNL IMD JNA MKJ VK CMN JW CR PK JLJ.