@article{article_626316, title={Acute Effects of High Intensity Competition on Macroelements and Relationship with Corrected QT Interval}, journal={Turkish Journal of Sport and Exercise}, volume={22}, pages={458–463}, year={2020}, author={Kashef, Alireza and Shahidi, Fereshteh and Sadeghinikoo, Alireza}, keywords={Calcium, Potassium, Sodium, Athletes, Sudden cardiac death}, abstract={<p class="MsoNormal" style="margin-bottom:.0001pt;text-align:justify;line-height:150%;"> <span lang="en-us" style="font-size:10px;line-height:150%;font-family:’Times New Roman’, serif;" xml:lang="en-us">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. </span> <span lang="en-us" style="font-size:10px;line-height:150%;font-family:’Times New Roman’, serif;" xml:lang="en-us"> Venous blood samples were obtained before and
immediately after the competition and analyzed for sodium, potassium and calcium. </span> <span lang="en-us" style="font-size:10px;line-height:150%;font-family:’Times New Roman’, serif;" xml:lang="en-us"> 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.  </span> </p> <p> </p>}, number={3}, publisher={Selcuk University}, organization={OXYGEN group}