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Previous issue date: 2017-03-03 / Objetivo: Analisar o efeito da carga interna competitiva (IC) sobre a atividade do eixo Hipot?lamo Hip?fise Adrenal (HHA) em atletas jovens durante os jogos oficiais. Metodologia: Um total de 20 atletas de futebol (16,8 ? 0,5, 172,9 ? 7,7cm, 65,0 ? 7,9kg, 8,3 ? 1,8% de gordura corporal, 53,1 ? 2,0 ml.kg.min-1) da categoria sub 17 que realizaram dois jogos sucessivos (J1 e J2), com um intervalo de 24 horas entre eles. Para determinar a carga interna competitiva, utilizou-se o m?todo Percep??o Subjetiva de Esfor?o da sess?o (PSE-sess?o), o cortisol salivar foi utilizado para determinar a atividade do eixo HHA e o tempo no campo (TEC) foi utilizado para a determina??o de a carga interna e medir o tempo que os atletas passaram em condi??o de jogo. O teste t pareado comparou os valores de cortisol salivar (pr? e p?s) em ambos os jogos; tamb?m comparou a IC, o TEC, o delta do cortisol salivar entre as partidas. Em um segundo, dividiu o grupo de jogadores de acordo com a mediana da carga interna (Alta carga interna) [ACI], n = 7; Baixa carga interna [BCI], n = 7). ANOVA mista de medidas repetidas, comparou os grupos no tempo e a intera??o dos grupos nos tempos para a vari?vel cortisol salivar. Utilizou-se um teste t independente para comparar as vari?veis carga interna, PSE-sess?o, TEC e varia??o do cortisol salivar entre os diferentes grupos. Resultados: As concentra??es salivares de cortisol aumentaram ap?s os dois jogos J1: p <0,001 e J2: p <0,001). N?o foram encontradas diferen?as entre a carga interna (p = 0,55), a PSE-sess?o (p = 0,32) e o TEC (p = 0,37) entre os jogos. O valor do cortisol de acordo com a divis?o dos grupos foi observado que a exposi??o dos atletas a diferentes cargas internas competitivas (ACI e BCI) acarretou respostas similares do eixo HHA (p> 0,05), embora os grupos apresentara efeito de tempo. Al?m disso, nas demais vari?veis de acordo com a divis?o dos grupos, os valores de IC, TEC e PSE-sess?o foram maiores no grupo ACI. Conclus?o: Em suma, jogos competitivos realizados em um curto per?odo de tempo acarretou um aumento de forma aguda os valores de cortisol salivar em ambos os jogos; no entanto, este aumento n?o parece ser dependente da exposi??o a diferentes magnitudes de carga interna competitiva em atletas jovens. / Objective: To analyze the effect of competitive internal load (IL) on the activity of the Hypothalamic Adrenal Hypophysis (HAH) axis in young athletes during official matches. Methodology: A total of 20 soccer athletes (16.8 ? 0.5, 172.9 ? 7.7cm, 65.0 ? 7.9kg, 8.3 ? 1.8% body fat, 53.1 ? 2.0ml.kg.min-1) of the under 17 category performed two successive matches (M1 and M2), with a 24-hour interval between them. In order to determine the competitive internal load, the method subjective effort exertion (session-RPE) was used, the salivary cortisol was used to determine the activity of the HHA axis and the time in the field (TIF) was used for the determination of the internal load and to measure the time that the athletes spent in game condition. Paired t test compared salivary cortisol values (pre and post) in both matches; Also compared the IL, the TIF, the salivary cortisol variation delta between the matches. In a second, divided the group of players according to the median of the internal load (high internal load) [HIL], n = 7; Low internal load [LIL], n = 7). Mixed ANOVA of repeated measures, compared the groups in time and the interaction of the groups in the times for the variable salivary cortisol. An independent t-test was used to compare the variables internal load, session-RPE, TIF and the salivary cortisol variation delta between the different groups. Results: Salivary cortisol concentrations were increased after both sets M1: p <0.001 and M2: p <0.001). No differences were found between internal loading (p = 0.55), session PSE (p = 0.32) and TIF (p = 0.37) between matches. The cortisol value according to the division of the groups was observed that the exposure of the groups (HIL and LIL) to different competitive internal loads has similar responses of salivary cortisol (p > 0.05), although the groups had an effect of time. In addition, in the other variables according to the division of the groups, the IL, TIF and session-RPE values were higher in the HIL group. Conclusion: In conclusion, competitive matches performed in a short period resulted in an acute increase in salivary cortisol values in both matches; however, this increase does not appear to be dependent on exposure to different magnitudes of competitive internal load in young athletes.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/23467 |
| Date | 03 March 2017 |
| Creators | Pinto, J?lio C?sar Barbosa de Lima |
| Contributors | 15986356896, http://lattes.cnpq.br/2948816921491767, Costa, Eduardo Caldas, 05304117417, http://lattes.cnpq.br/1216441676725839, Elsangedy, Hassan Mohamed, 04459139910, http://lattes.cnpq.br/7777329239184430, Moreira, Alexandre, 13238963848, http://lattes.cnpq.br/5655930868903498, Fortes, Leonardo de Sousa, 01503116646, http://lattes.cnpq.br/6683367406867309, Mortatti, Arnaldo Luis |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM EDUCA??O F?SICA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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