CHANGES OF CORTISOL VALUES IN YOUNG MEN WITH DIFFERENT LEVELS OF PHYSICAL FITNESS DURING RECOVERY AFTER SUBMAXIMAL MUSCULAR LOAD
Abstract
Aim. The aim of the research was to study changes of blood cortisol values in response to muscular load and during post-load recovery in young men with different levels of physical fitness. Materials and Methods. Participants were divided into three groups: athletes developing speed-strength qualities (n = 18), athletes developing endurance (n = 18), and control group including apparently healthy men not engaged in sports (n = 16). 30-minute and 60-minute cycle ergometer tests (2W per kg of body weight) were used to model acute muscle effort. Serum cortisol values were assessed before tests (baseline values), immediately after load, and after an hour of recovery. Results. Cortisol values were significantly decreased (p &< 0.05) after an hour of restitution in groups where baseline cortisol levels had been higher than physiologically normal values. This phenomenon was observed irrespective of specifics of physical fitness of the participants and load duration. Groups with normal baseline cortisol values had significant increase of hormone concentration (p &< 0.05) immediately after load and after an hour of recovery. Conclusion. Decrease of cortisol values may be associated with processes of protective inhibition of hypothalamic-pituitary-adrenal axis if baseline hormone levels are increased. At normal baseline cortisol levels the adequate response to physical load “switching” metabolism to catabolic processes is the increase of hormone values. Analysis of changes in cortisol levels related to controlled physical load may help in assessment of adaptive capacity and diagnosis of fatigue.References
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10. Reznikov A.G. [Endocrinological Aspects of Stress]. Mezhdunarodnyy endokrinologicheskiy zhurnal [International Journal of Endocrinology], 2007, no. 4(10), pp. 11–17. (in Russ.)
11. Isaev A.P., Erlikh V.V., Aminov A.S., Nenasheva A.V. [System-Synergetic Approach to the Integration of the Theory of Adaptation and Individualization of Sports Training in Cyclic Sports, Developing Endurance]. Bulletin of South Ural State University. Ser. Education, Healthcare Service, Physical Education, 2014, vol. 14, no. 4, pp. 20–32. (in Russ.)
12. Filippov M.M., Pogodina S.V., Yuferev V.S. [Gonads, Adrenal Changes in Athletes-Veterans During Muscular Activity]. Vestnik Severnogo (Arkticheskogo) federal'nogo universiteta. Seriya “Medikobiologicheskie nauki” [Bulletin of the Northern (Arctic) Federal University. A Series of Life Sciences], 2013, no. 2, pp. 78–85. (in Russ.)
13. Brady S.T., Siegel G., Albers R.W., Price D. Basic Neurochemistry. Principles of Molecular, Cellular, and Medical Neurobiology, 8th ed. Academic Press / Elsevier, 2012. 1096 p.
14. Rodrigo Gomes de Souza Vale, Guilherme Rosa, Rudy Jose Nodari Junior, Estelio Henrique Martin Dantas. Cortisol and Physical Exercise. Alonzo Esposito and Vito Bianchi (editors). Cortisol. Physiology, Regulation and Health Implications. New York, Nova Science Publishers, Inc. 2012,
рp. 129–138.
15. Guyton C., Hall J.E. Textbook of Medical Physiology, 12th edition. Saunders, 2010. 1120 p.
16. Hackney A.C. Cortisol, Stress and Adaptation During Exercise Training. Education Physical Training Sport, 2008, no. 3(70), pp. 34–41.
17. Lavin N. Manual of Endocrinology and Metabolism, 4th. ed. Lippincott Williams & Wilkins (LWW), 2009. 832 p.
18. Brownlee K.K., Moore A.W., Hackney A.C. Relationship Between Circulating Cortisol and Testosterone. Influence of Physical Exercise. Journal of Sports Science and Medicine, 2005, no. 4, pp. 76–83.
19. Silbernagl S., Despopoulos A. Color Atlas of Physiology (Basic Sciences), 6th ed. New York, 2008. 456 p.
References on translit
Published
2017-02-01
How to Cite
Samikulin, P., & Gryaznykh, A. (2017). CHANGES OF CORTISOL VALUES IN YOUNG MEN WITH DIFFERENT LEVELS OF PHYSICAL FITNESS DURING RECOVERY AFTER SUBMAXIMAL MUSCULAR LOAD. Human. Sport. Medicine, 17(1), 5-13. https://doi.org/10.14529/hsm170101
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