Department of Clinical Physiology,Sundsvall County Hospital,Sundsvall 85186,Sweden;
Department of Clinical Chemistry,Sundsvall County Hospital,Sundsvall 85186,Sweden;
Department of Natural Sciences,Mid Sweden University,Sundsvall 85170,Sweden;
Athlete; Exercise; Floorball; Sports medicine; Yo-Yo IR2 test; Myocardial injury; Cardiac troponin;