TY - JOUR T1 - Acute Effects of High Intensity Competition on Macroelements and Relationship with Corrected QT Interval AU - Kashef, Alireza AU - Shahidi, Fereshteh AU - Sadeghinikoo, Alireza PY - 2020 DA - December Y2 - 2021 JF - Turkish Journal of Sport and Exercise JO - Turk J Sport Exe PB - Selcuk University WT - DergiPark SN - 2147-5652 SP - 458 EP - 463 VL - 22 IS - 3 LA - en AB - The purpose of this study is the find the changes of calcium,sodium and potassium ions and relationship with QTc interval in professionalathletes during a short duration intense exercise. Thirty-two male athletes (age,26.9±4.7 yrs) competed in 8 minutes high intensity competition. The competitionitems included: Running on Skillmill for400 meters; Three-stage deadlifting, bar pulling up, 30-kilogram kettle bellswinging and throwing 20 sand-filled balls. The resting electrocardiogram wasrecorded in a sitting position for one minute. Venous blood samples were obtained before andimmediately after the competition and analyzed for sodium, potassium and calcium. Plasma volume changes were estimated from hemoglobin andhematocrit readings before and after competition. The results showed that theserum calcium (p<0.001) and sodium (p<0.001) levels significantlyincreased as a result of intense exercise activities while the serum potassium(p<0.001) significantly decreased. After adjusting raw data for plasmavolume changes serum calcium, sodium and potassium significantly decreased(p<0.001). No significant relationship between QTc and Ca, Na and K at rest.These results implicated that high-intensity exercise would provoke the changeof macroelements and the current data suggest that the Ca, Na and K don’t haverelationship with QTc at rest. KW - Calcium KW - Potassium KW - Sodium KW - Athletes KW - Sudden cardiac death CR - 1. Alis R, Sanchis-Gomar F, Primo-Carrau C, Lozano-Calve S, Dipalo M, Aloe R, et al. 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