Salivary osmolality measured by MX3 hydration testing system demonstrates high reliability but limited validity in elite athlete hydration assessment

• Stefan Pettersson ,

  Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Resources, Supervision, Visualization, Writing – original draft, Writing – review & editing

  * E-mail: stefan.pettersson@ped.gu.se

  Affiliations Center for Health and Performance, Department of Food and Nutrition, and Sport Science, University of Gothenburg, Gothenburg, Sweden, Swedish Olympic Committee, Sofiatornet, Olympiastadion, Stockholm, Sweden

  https://orcid.org/0000-0003-4458-3343

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• Lykke Tamm,

  Roles Conceptualization, Methodology, Writing – review & editing

  Affiliation Swedish Olympic Committee, Sofiatornet, Olympiastadion, Stockholm, Sweden

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• Stig Mattsson,

  Roles Conceptualization, Data curation, Investigation, Methodology, Writing – review & editing

  Affiliation Swedish Olympic Committee, Sofiatornet, Olympiastadion, Stockholm, Sweden

  https://orcid.org/0000-0001-8444-1505

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• Anton Kalén

  Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Visualization, Writing – review & editing

  Affiliations Swedish Olympic Committee, Sofiatornet, Olympiastadion, Stockholm, Sweden, Department of Computer Science, Electrical and Space Engineering, Luleå University of Technology, Luleå, Sweden

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