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Abstract

COMPARISON OF THE EFFECT OF CONTINUOUS/INTERVAL AEROBIC EXERCISE ON THE URINARY AMOUNT OF SODIUM AND POTASSIUM OF THE BOYS AGED 15-18 YEARS

Mahmoud Reza Mottaghi, Mojtaba Kianmehr, Mostafa Amiri, Zahra Rouhani, Seyyed Hossein Abatahi Ivari*

ABSTRACT

Sport exercises cause many changes in the kidney hemodynamics and
water balance and electrolyte. The aim of this study was to compare
the effect of a continuous/interval aerobic training session on the
amount of sodium and potassium in the urine of boys. This study was a
quasi-experimental study and the population of the study consisted
male students aged 15-18 at the boarding high schools of Gonabad in
the school year of 2012. Of those students who met the inclusion
criteria, 40 students (20 subjects in each group) were randomly
selected. Before exercise, 24-hour urine samples were collected.
Subjects did continuous aerobic exercises in a day and catabolic wash
out was performed for a week and then subjects did interval aerobic
exercises and the priorities in training procedures were determined by
draw. To analyze the data statistically, paired t-test was used to
compare means of quantitative factors before and after the intervention in dependent groups and independent t-test was used to compare means of quantitative factors between two training groups. Significance level was considered smaller than. 05. The results showed that there was no significant difference (p<.05) between the effects of continuous/interval aerobic exercises on the 24-hour urinary sodium and potassium levels. Moreover, there was no significant difference between the values of these variables with the exception of 24-hour urinary potassium (p<.05) before and after both types of these exercises. Therefore, these exercises not only improve the students' athletic performance but also prevent excessive pressure on those who lack glycogen, lipid and protein supplies as fuel.

Keywords: Aerobic exercise, sodium, potassium, urine.


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