Russians are the fastest 100-km ultra-marathoners in the world

• Beat Knechtle ,

  Roles Conceptualization, Data curation, Methodology, Writing – original draft

  * E-mail: beat.knechtle@hispeed.ch

  Affiliations Medbase St. Gallen Am Vadianplatz, St. Gallen, Switzerland, Institute of Primary Care, University of Zurich, Zurich, Switzerland

  http://orcid.org/0000-0002-2412-9103

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• Pantelis Theodoros Nikolaidis,

  Roles Conceptualization, Writing – original draft

  Affiliation Exercise Physiology Laboratory, Nikaia, Greece

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• Fabio Valeri

  Roles Data curation, Formal analysis, Methodology, Writing – original draft

  Affiliation Institute of Primary Care, University of Zurich, Zurich, Switzerland

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