European Journal of Molecular & Clinical Medicine

Abstract

Physical activity causes various changes in the body's regulatory system, these changes are
influenced by the type, frequency, duration, and intensity of the exercise. One of the
changes is sweating to regulate body temperature. The fluid that comes out through sweat
contains water and electrolytes such as sodium and potassium which are important for
body metabolism. Electrolyte balance affects fluid balance and cell function. When
exercise, increased sodium can occur due to a deficit in body fluids due to water excretion
that far exceeds sodium excretion and insufficient water intake. The increase in serum
potassium levels occurs due to the transfer of potassium from the intracellular fluid (CIS)
to the extracellular fluid (CES), which is then excreted together with sweat as a result of
increased body heat. The increase in serum calcium levels after physical activity is caused
by the activation of the body's homeostasis mechanism to maintain normal serum calcium
levels as an essential substance in the process of muscle contraction. There is also a
temporary transfer of magnesium from the extracellular fluid to the skeletal muscle tissue
so that the amount of magnesium contained in the skeletal muscle increases while the
plasma magnesium concentration decreases. Changes in electrolyte levels due to physical
exercise are influenced by the type, duration, and intensity of exercise performed. so that
the amount of magnesium contained in skeletal muscle becomes more while the plasma
magnesium concentration decreases. Changes in electrolyte levels due to physical exercise
are influenced by the type, duration, and intensity of exercise performed. so that the
amount of magnesium contained in skeletal muscle becomes more while the plasma
magnesium concentration decreases. Changes in electrolyte levels due to physical exercise
are influenced by the type, duration, and intensity of exercise.