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Master's Dissertation
DOI
10.11606/D.17.2011.tde-17092011-153226
Document
Author
Full name
José Henrique Mazon
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
Ribeirão Preto, 2011
Supervisor
Committee
Souza, Hugo Celso Dutra de (President)
Borin, João Paulo
Salgado, Helio Cesar
Title in Portuguese
Efeitos da periodização do treinamento sobre a modulação autonômica cardíaca e marcadores de estresse endógenos em atletas de voleibol
Keywords in Portuguese
marcadores de estresse
modulação autonômica cardíaca
Periodização do treinamento
Abstract in Portuguese
Nós investigamos os efeitos do modelo de periodização de cargas seletivas (MPCS) sobre a modulação autonômica da variabilidade da freqüência cardíaca (VFC) e marcadores de estresse endógenos, antes e após um período de competição, em jogadores de voleibol (N=32). O protocolo experimental para a avaliação da VFC consistiu do uso da análise espectral das séries temporais compostas dos intervalos R-R derivados do eletrocardiograma obtidos na posição supina e durante o teste de inclinação (tilt test). Os níveis dos marcadores de estresse foram determinados pela quantificação da concentração plasmática de catecolaminas endógenas, cortisol e testosterona livre. Os resultados não demonstraram alterações na VFC antes e após o período de competição. Em contraste, a quantificação da concentração plasmática dos marcadores de estresse endógenos revelou reduções nos níveis de catecolaminas totais, noradrenalina e cortisol. Estas mudanças foram acompanhadas por aumentos na concentração de testosterona livre e na razão testosterona/cortisol. Em conclusão, nossos resultados demonstraram que o MPCS não alterou a modulação autonômica da VFC, mas promoveu adaptações benéficas aos atletas, incluindo mudanças positivas na concentração plasmática dos marcadores de estresse endógenos analisados. A ausência de alterações na VFC indica que não houve relação direta entre modulação autonômica cardíaca e marcadores de estresse endógenos no presente estudo.
Title in English
Effects of training periodization on cardiac autonomic modulation and stress endogenous markers in volleyball players
Keywords in English
cardiac autonomic modulation
stress markers
Training periodization
Abstract in English
We investigated the effects of selective loads of periodization model (SLPM) on autonomic modulation of heart rate variability (HRV) and endogenous stress markers before and after a competition period in volleyball players (N=32). The experimental protocol for the evaluation of HRV consisted of using spectral analysis of time series composed of the R-R intervals derived from electrocardiogram obtained in the supine position and during the tilt test. Stress marker levels were determined by quantifying the plasma concentration of endogenous catecholamines, cortisol and free testosterone. The results showed no changes between the levels of HRV before and after a competition period. In contrast, the quantification of the plasma concentration of endogenous stress markers revealed reductions in the levels of total catecholamines, noradrenaline and cortisol. In conclusion, our results demonstrate that the SLPM did not change the cardiac autonomic modulation of HRV, but promoted beneficial adaptations in athletes, including positive changes in the plasma concentration of the endogenous stress markers. The absence of changes in HRV indicates that there is no direct relationship between cardiac autonomic modulation and endogenous stress markers in the present study.
 
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Mazon.pdf (2.66 Mbytes)
Publishing Date
2011-12-12
 
WARNING: The material described below relates to works resulting from this thesis or dissertation. The contents of these works are the author's responsibility.
  • Cozza, Izabela C, et al. Physical exercise improves cardiac autonomic modulation in hypertensive patients independently of angiotensin-converting enzyme inhibitor treatment [doi:10.1038/hr.2011.162]. Hypertension Research [online], 2011, vol. 35, p. 82-87.
  • DUTRA, SABRINA G. V., et al. Cardiac Autonomic Modulation Is Determined by Gender and Is Independent of Aerobic Physical Capacity in Healthy Subjects [doi:10.1371/journal.pone.0077092]. Plos One [online], 2013, vol. 8, p. e77092.
  • MAZON, J., et al. Effects of training periodization on cardiac autonomic modulation and endogenous stress markers in volleyball players : Models of periodization and stress markers [doi:10.1111/j.1600-0838.2011.01357.x]. Scandinavian Journal of Medicine & Science in Sports [online], 2011, p. no.
  • Mazon, J., et al. Effects of training periodization on cardiac autonomic modulation and endogenous stress markers in volleyball players [doi:10.1111/j.1600-0838.2011.01357.x]. Scandinavian Journal of Medicine & Science in Sports [online], 2013, vol. 23, p. 114-120.
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