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Strength-training and biological rhythm of male sex hormone among judoists

Testosterone is a steroid hormone that is secreted by the testes with a diurnal rhythm and has a strong anti-catabolic (anabolic) effect on muscles. There is a strong relationship (r > 0.9) between concentrations of testosterone in the saliva and blood. The main purpose of the current study is to...

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Main Authors: Shariat, Ardalan, Kargarfard, Mehdi, Mohd Tamrin, Shamsul Bahri, Danaeed, Mahmoud, Karimi, Hossein
Format: Article
Language:English
Published: Taylor & Francis 2014
Online Access:http://psasir.upm.edu.my/id/eprint/35484/1/Strength-training%20and%20biological%20rhythm%20of%20male%20sex%20hormone%20among%20judoists.pdf
http://psasir.upm.edu.my/id/eprint/35484/
http://www.tandfonline.com/doi/abs/10.1080/09291016.2014.884304
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spelling my.upm.eprints.354842016-01-27T04:47:51Z http://psasir.upm.edu.my/id/eprint/35484/ Strength-training and biological rhythm of male sex hormone among judoists Shariat, Ardalan Kargarfard, Mehdi Mohd Tamrin, Shamsul Bahri Danaeed, Mahmoud Karimi, Hossein Testosterone is a steroid hormone that is secreted by the testes with a diurnal rhythm and has a strong anti-catabolic (anabolic) effect on muscles. There is a strong relationship (r > 0.9) between concentrations of testosterone in the saliva and blood. The main purpose of the current study is to investigate the effect of strength-training on levels of salivary testosterone in male judoists. In a cross-sectional investigation, a population of 18 fit young male judoists (aged 17.0 ± 1.2 year, body mass 72 ± 3 kg, height 175 ± 3 cm, means ± SD), with at least 1.5 years of experience in judo classes was examined in Isfahan, Iran, in December, 2012. The period of testing consisted of two days of “rest” and two days of “exercise”. Subjects were randomly divided into two conditions that performed either the “rest” or “exercise” days during the first week, with the opposite type of day in the second week. The training regimen consisted of three repetitions of nine tasks, with 1 min of rest between each of the three sets, performed on alternate days for 8 weeks. Unstimulated saliva was collected (1–2 ml) every 2 h from 06:00 till 22:00 h. ANOVA with repeated measures was used to assess differences between the rest and exercise days. Strength-training sessions caused a significant decrease in testosterone levels immediately after exercise (p < 0.001), but there was no significant difference between the daily profiles of testosterone during the rest or exercise days (p > 0.05). It is concluded that strength-training does not significantly affect the normal biological rhythm of salivary testosterone during the waking period in male judoists. Taylor & Francis 2014 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/35484/1/Strength-training%20and%20biological%20rhythm%20of%20male%20sex%20hormone%20among%20judoists.pdf Shariat, Ardalan and Kargarfard, Mehdi and Mohd Tamrin, Shamsul Bahri and Danaeed, Mahmoud and Karimi, Hossein (2014) Strength-training and biological rhythm of male sex hormone among judoists. Biological Rhythm Research, 45 (4). 625 -631. ISSN 0929-1016; ESSN: 1744-4179 http://www.tandfonline.com/doi/abs/10.1080/09291016.2014.884304 10.1080/09291016.2014.884304
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Testosterone is a steroid hormone that is secreted by the testes with a diurnal rhythm and has a strong anti-catabolic (anabolic) effect on muscles. There is a strong relationship (r > 0.9) between concentrations of testosterone in the saliva and blood. The main purpose of the current study is to investigate the effect of strength-training on levels of salivary testosterone in male judoists. In a cross-sectional investigation, a population of 18 fit young male judoists (aged 17.0 ± 1.2 year, body mass 72 ± 3 kg, height 175 ± 3 cm, means ± SD), with at least 1.5 years of experience in judo classes was examined in Isfahan, Iran, in December, 2012. The period of testing consisted of two days of “rest” and two days of “exercise”. Subjects were randomly divided into two conditions that performed either the “rest” or “exercise” days during the first week, with the opposite type of day in the second week. The training regimen consisted of three repetitions of nine tasks, with 1 min of rest between each of the three sets, performed on alternate days for 8 weeks. Unstimulated saliva was collected (1–2 ml) every 2 h from 06:00 till 22:00 h. ANOVA with repeated measures was used to assess differences between the rest and exercise days. Strength-training sessions caused a significant decrease in testosterone levels immediately after exercise (p < 0.001), but there was no significant difference between the daily profiles of testosterone during the rest or exercise days (p > 0.05). It is concluded that strength-training does not significantly affect the normal biological rhythm of salivary testosterone during the waking period in male judoists.
format Article
author Shariat, Ardalan
Kargarfard, Mehdi
Mohd Tamrin, Shamsul Bahri
Danaeed, Mahmoud
Karimi, Hossein
spellingShingle Shariat, Ardalan
Kargarfard, Mehdi
Mohd Tamrin, Shamsul Bahri
Danaeed, Mahmoud
Karimi, Hossein
Strength-training and biological rhythm of male sex hormone among judoists
author_facet Shariat, Ardalan
Kargarfard, Mehdi
Mohd Tamrin, Shamsul Bahri
Danaeed, Mahmoud
Karimi, Hossein
author_sort Shariat, Ardalan
title Strength-training and biological rhythm of male sex hormone among judoists
title_short Strength-training and biological rhythm of male sex hormone among judoists
title_full Strength-training and biological rhythm of male sex hormone among judoists
title_fullStr Strength-training and biological rhythm of male sex hormone among judoists
title_full_unstemmed Strength-training and biological rhythm of male sex hormone among judoists
title_sort strength-training and biological rhythm of male sex hormone among judoists
publisher Taylor & Francis
publishDate 2014
url http://psasir.upm.edu.my/id/eprint/35484/1/Strength-training%20and%20biological%20rhythm%20of%20male%20sex%20hormone%20among%20judoists.pdf
http://psasir.upm.edu.my/id/eprint/35484/
http://www.tandfonline.com/doi/abs/10.1080/09291016.2014.884304
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score 13.211869

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