Correlation of Serum Electrolytes (Na+, K+, Ca++, Mg++) and ECG Changes Before and After Exercise

Exercise is known to cause changes in electrolytes in different compartments of the body and homeostasiskeeps in check these changes. This study was planned to access and evaluate changes biochemical parameterslike Na+, K+, Ca++ and Mg++ along with changesin E.C.G. in healthy young Indian adults. Fifty two healthystudents (26 each, male and female) with an age range of 18–30 years were subjects in this study. Theparticipants performed an exercise test of moderate to vigorous intensity on bicycle ergometer. Pre and postexercise biochemical parameters (serum electrolytes Na+ K+ Mg++ Ca++) along with ECG was done. Theserum sodium levels in both pre & post exercise group were within normal range but serum sodium is highlysignificant in post exercise group. The serum potassium levels in both pre & post exercise group were withinnormal range but serum potassium is highly significant in post exercise group. The serum magnesium levelsin both pre & post exercise group were within normal range but serum magnesium is highly significant inpost exercise group. The serum calcium levels in both pre & post exercise group were within normal rangebut serum calcium is highly significant in post exercise group. In the ECG the voltage of p wave QRScomplex and ST segment shows highly significant/significant changes in pre and post exercise group. Theduration of ST segment, RR interval, QT interval and QTc interval change highly significantly in the pre andpost exercising group. PR interval is no change in either group.