Acute Effects of High Intensity Competition on Macroelements and Relationship with Corrected QT Interval

Year 2020, Volume: 22 Issue: 3, 458 - 463, 31.12.2020

Alireza Kashef Fereshteh Shahidi Alireza Sadeghinikoo

Abstract

The purpose of this study is the find the changes of calcium,
sodium and potassium ions and relationship with QTc interval in professional
athletes during a short duration intense exercise. Thirty-two male athletes (age,
26.9±4.7 yrs) competed in 8 minutes high intensity competition. The competition
items included: Running on Skillmill for
400 meters; Three-stage deadlifting, bar pulling up, 30-kilogram kettle bell
swinging and throwing 20 sand-filled balls. The resting electrocardiogram was
recorded in a sitting position for one minute. Venous blood samples were obtained before and
immediately after the competition and analyzed for sodium, potassium and calcium. Plasma volume changes were estimated from hemoglobin and
hematocrit readings before and after competition. The results showed that the
serum calcium (p<0.001) and sodium (p<0.001) levels significantly
increased as a result of intense exercise activities while the serum potassium
(p<0.001) significantly decreased. After adjusting raw data for plasma
volume 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 change
of macroelements and the current data suggest that the Ca, Na and K don’t have
relationship with QTc at rest. 

Keywords

Calcium, Potassium, Sodium, Athletes, Sudden cardiac death

Supporting Institution

OXYGEN group

Thanks

The authors wish to thank Amirhossein Farzaneh and Reza Javid and other OXYGEN member of board for their support.

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