The Effect of Heavy Resistance Exercise on Circadian Rhythm of Salivary Cortisol in Male Body Building Athletes
Background: The aim of the present study was to evaluate the effect of heavy resistance exercise on the circadian rhythm of salivary cortisol in male body building athletes. Methods: In this balanced, crossover study, 15 healthy resistance-trained men (mean age, weight and height: 21.45 ± 1.10 years...
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Vesnu Publications
2012-02-01
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doaj-e2a4b7fd1aa444ef86112557d84049222020-11-24T20:43:06ZfasVesnu Publications مجله دانشکده پزشکی اصفهان1027-75951735-854X2012-02-012916724002412834The Effect of Heavy Resistance Exercise on Circadian Rhythm of Salivary Cortisol in Male Body Building AthletesArdalan Shariat0Mehdi Kargarfard1Gholam Reza Sharifi2School of Physical Education and Sport Sciences, Khorasgan Branch, Islamic Azad University, Isfahan, IraAssociate Professor, Department of Sport Physiology, School of Physical Education and Sport Sciences, Isfahan University, Isfahan, IranAssistant Professor, School of Physical Education and Sport Sciences, Khorasgan Branch, Islamic Azad University, Isfahan, IranBackground: The aim of the present study was to evaluate the effect of heavy resistance exercise on the circadian rhythm of salivary cortisol in male body building athletes. Methods: In this balanced, crossover study, 15 healthy resistance-trained men (mean age, weight and height: 21.45 ± 1.10 years, 76.50 ± 4.20 kg, and 178.30 ± 3.60 cm, respectively) with three years of previous experience in resistance exercise were selected. At the time of study, the subjects were involved in a resistance training program of at least three sessions per week. The testing period included two test days per week, incorporating a total of two days of "rest" and two days of "exercise". Subjects were randomly selected to participate on the "rest" and "exercise" days. The heavy resistance exercise protocol consisted of three, ten-repetition sets using 75% of one repetition maximum (1RM). Saliva samples were obtained every two hours for a maximum of 16 hours during each testing day. The repeated measures analysis of variance (ANOVA) was followed by post-hoc LSD test. The significance level was considered as P ≤ 0.05. Findings: There was a significant increase in the level of salivary cortisol immediately after the heavy resistance exercise session (P ≤ 0.05). There were no significant differences between the exercise and control days in circadian rhythm of salivary cortisol (P ≥ 0.05). Conclusion: This study showed that heavy resistance exercise had a significant effect on cortisol release immediately post exercise, but did not significantly affect the waking circadian rhythm in male body building athleteshttp://jims.mui.ac.ir/index.php/jims/article/view/1391Resistance exerciseCircadian rhythmSalivary cortisol |
collection |
DOAJ |
language |
fas |
format |
Article |
sources |
DOAJ |
author |
Ardalan Shariat Mehdi Kargarfard Gholam Reza Sharifi |
spellingShingle |
Ardalan Shariat Mehdi Kargarfard Gholam Reza Sharifi The Effect of Heavy Resistance Exercise on Circadian Rhythm of Salivary Cortisol in Male Body Building Athletes مجله دانشکده پزشکی اصفهان Resistance exercise Circadian rhythm Salivary cortisol |
author_facet |
Ardalan Shariat Mehdi Kargarfard Gholam Reza Sharifi |
author_sort |
Ardalan Shariat |
title |
The Effect of Heavy Resistance Exercise on Circadian Rhythm of Salivary Cortisol in Male Body Building Athletes |
title_short |
The Effect of Heavy Resistance Exercise on Circadian Rhythm of Salivary Cortisol in Male Body Building Athletes |
title_full |
The Effect of Heavy Resistance Exercise on Circadian Rhythm of Salivary Cortisol in Male Body Building Athletes |
title_fullStr |
The Effect of Heavy Resistance Exercise on Circadian Rhythm of Salivary Cortisol in Male Body Building Athletes |
title_full_unstemmed |
The Effect of Heavy Resistance Exercise on Circadian Rhythm of Salivary Cortisol in Male Body Building Athletes |
title_sort |
effect of heavy resistance exercise on circadian rhythm of salivary cortisol in male body building athletes |
publisher |
Vesnu Publications |
series |
مجله دانشکده پزشکی اصفهان |
issn |
1027-7595 1735-854X |
publishDate |
2012-02-01 |
description |
Background: The aim of the present study was to evaluate the effect of heavy resistance exercise on the circadian rhythm of salivary cortisol in male body building athletes.
Methods: In this balanced, crossover study, 15 healthy resistance-trained men (mean age, weight and height: 21.45 ± 1.10 years, 76.50 ± 4.20 kg, and 178.30 ± 3.60 cm, respectively) with three years of previous experience in resistance exercise were selected. At the time of study, the subjects were involved in a resistance training program of at least three sessions per week. The testing period included two test days per week, incorporating a total of two days of "rest" and two days of "exercise". Subjects were randomly selected to participate on the "rest" and "exercise" days. The heavy resistance exercise protocol consisted of three, ten-repetition sets using 75% of one repetition maximum (1RM). Saliva samples were obtained every two hours for a maximum of 16 hours during each testing day. The repeated measures analysis of variance (ANOVA) was followed by post-hoc LSD test. The significance level was considered as P ≤ 0.05.
Findings: There was a significant increase in the level of salivary cortisol immediately after the heavy resistance exercise session (P ≤ 0.05). There were no significant differences between the exercise and control days in circadian rhythm of salivary cortisol (P ≥ 0.05).
Conclusion: This study showed that heavy resistance exercise had a significant effect on cortisol release immediately post exercise, but did not significantly affect the waking circadian rhythm in male body building athletes |
topic |
Resistance exercise Circadian rhythm Salivary cortisol |
url |
http://jims.mui.ac.ir/index.php/jims/article/view/1391 |
work_keys_str_mv |
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