Article
Acute effects of whole-body vibration on testosterone responses in the athlete and non athlete
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Authors
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Farah Nameni
- Department of Physical Education, Islamic Azad University Branch Varamin - Pishva, Iran
| Published: | October 24, 2011 |
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Outline
Text
Objective: Recently, sport immunology has been noticed by many researchers of sport science, physiology, immunology and behavior sciences. It has been found that there is significant relationship between neuro-hormonal and immune systems. Sport effectively alters hormone level and neural system functions. Findings indicated increase of testosterone and growth hormones level
Material/Methods: Since control of all effective factors on variables of the research was not possible, hence it was done in a semi experimental method. Athlete group were with mean age of 23.4±1.4 years, height 166±4.43 cm and weight 61±3.2 Kg. and non athlete group with age of 22±2.3 years, height 168±4.15 cm and weight of 63±3.26 Kg were selected. Blood samples were collected from the left hand brachial vein before, immediately after, and 2 h after vibration For data analysis, the inferential statistic methods such as variance of analysis (ANOVA) with repeated measurements and following test of LSD were used
Results: One session vibration training has significant effect on the serum testosterone concentration in the athletes and non-athletes girls (P≤0.05). Serum testosterone concentration in the athlete girls immediately after training and after training showed significant difference compared to the before training, but insignificant 2 h after training compared to immediately after training. Also serum testosterone concentration in the non athlete girls immediately after training showed significant decline compared to the before training, and had significant difference 2h after training compared to immediately after training. Insignificant difference was noticed between before training and 2h after training .
Conclusion: We found increase of testosterone. One of them is increase of hormone secretion though stimulation of hypothalamus and hypophysis – adrenal.Testosterone – cortisol ratio is an anabolic to catabolic index. Findings of the present study indicated that one session vibration training at 40 Hz frequency causes decrease of testosterone significantly .The reason could be attributed to the nature of vibration, intensity, time or amptitude of vibration performance, further relevant studies are suggested.
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