Effect of Various Grades of Exercise on Serum Cortisol
Keywords:Serum Cortisol, Exercise.
Increasing incidence and prevalence of chronic diseases are mostly due to improving socio-economic status
and changes in modern lifestyles, including diets which are high in salt, sugar, and undesirable fats and
decrease in physical activity levels in Indian population. The present study evaluates the effect of various
grades of exercise on serum cortisol in healthy young Indian adults. The objective of the study was to
evaluate the pre and post exercise changes in serum cortisol levels. A total 56 healthy First year MBBS
student’s age between 18-27 yrs of either sex were taken at G.S.V.M. Medical College Kanpur. The subjects
were treated with moderate and heavy exercise. Pre-exercise determination of serum total cortisol of all the
subjects was done. Post-exercise determination of serum total cortisol of all the subjects after duration of
one week and 12 weeks of exercise was done. After completion of 12 weeks of exercise a comparison was
made between pre and post exercise values of total serum cortisol. Statistical Analysis was done by paired
student ‘t’ test and 95% level of confidence was taken significant (p<0.05).Results indicated that Serum
cortisol varies with different grades of exercise and there was slight increase in serum cortisol concentration
after moderate exercise but it was of not very much significance. There are some divergent findings also
and most literature has cited that an approximate 60% exercise intensity threshold is necessary to elicit a
significant increase in blood cortisol.Thus, according to our study, there is correlation of the serum cortisol
levels according to the different grades of exercise.
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