Stabilization period before capturing an ultra-short vagal index can be shortened to 60 s in endurance athletes and to 90 s in university students

• Jakub Krejčí ,

  Roles Conceptualization, Formal analysis, Methodology, Project administration, Visualization, Writing – original draft, Writing – review & editing

  * E-mail: jakub.krejci@upol.cz

  Affiliation Department of Natural Sciences in Kinanthropology, Faculty of Physical Culture, Palacký University Olomouc, Olomouc, Czech Republic

  http://orcid.org/0000-0002-7236-8328

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• Michal Botek,

  Roles Conceptualization, Investigation, Methodology, Resources, Writing – review & editing

  Affiliation Department of Natural Sciences in Kinanthropology, Faculty of Physical Culture, Palacký University Olomouc, Olomouc, Czech Republic

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• Andrew J. McKune

  Roles Writing – original draft, Writing – review & editing

  Affiliations Faculty of Health, Discipline of Sport and Exercise Science, UC-Research Institute for Sport and Exercise, University of Canberra, Canberra, Australia, School of Health Sciences, Discipline of Biokinetics, Exercise and Leisure Sciences, University of KwaZulu-Natal, Durban, South Africa

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