Correlation of Serum Electrolytes (Na+, K+, Ca++, Mg++) and ECG Changes Before and After Exercise
Keywords:Exercise, Serum electrolytes Na K Mg Ca , E.C.G.
Exercise is known to cause changes in electrolytes in different compartments of the body and homeostasis
keeps in check these changes. This study was planned to access and evaluate changes biochemical parameters
like Na+, K+, Ca++ and Mg++ along with changesin E.C.G. in healthy young Indian adults. Fifty two healthy
students (26 each, male and female) with an age range of 18–30 years were subjects in this study. The
participants performed an exercise test of moderate to vigorous intensity on bicycle ergometer. Pre and post
exercise biochemical parameters (serum electrolytes Na+ K+ Mg++ Ca++) along with ECG was done. The
serum sodium levels in both pre & post exercise group were within normal range but serum sodium is highly
significant in post exercise group. The serum potassium levels in both pre & post exercise group were within
normal range but serum potassium is highly significant in post exercise group. The serum magnesium levels
in both pre & post exercise group were within normal range but serum magnesium is highly significant in
post exercise group. The serum calcium levels in both pre & post exercise group were within normal range
but serum calcium is highly significant in post exercise group. In the ECG the voltage of p wave QRS
complex and ST segment shows highly significant/significant changes in pre and post exercise group. The
duration of ST segment, RR interval, QT interval and QTc interval change highly significantly in the pre and
post exercising group. PR interval is no change in either group.
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