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Previous issue date: 2016-02-26 === Esportes com calend?rios congestionados como o futebol precisam ser monitorados para garantir que estrat?gias de recupera??o como o crioterapia por imers?o (CWI) sejam implementadas para melhorar o desempenho e minimizar o risco de les?es em esportistas. Esta t?cnica ? muito aceita por profissionais da sa?de e atletas, por?m os estudos ainda s?o controversos em rela??o aos benef?cios fisiol?gicos Objetivo: Avaliar o efeito acumulativo de CWI no processo de recupera??o muscular de atletas de futebol. Materiais e M?todos: Trata-se de um ensaio cl?nico randomizado. Foram inclu?dos 23 atletas aleatoriamente divididos em dois grupos: controle (10 minutos sentados) e experimental (CWI 10?C ?10 minutos). Ao todo, foram realizadas 7 sess?es imediatamente ap?s o treino. Foram avaliados, Creatina Quinase (CK), Lactato Desidrogenase (LDH), Atividade Eletromiogr?fica (pico do reto anterior, vasto lateral, b?ceps femoral), For?a Isom?trica de flexores e extensores de joelho, Pot?ncia do Salto, Percep??o Subjetiva de Esfor?o (PSE) e Percep??o de Recupera??o (PR). As avalia??es funcionais ocorreram no primeiro dia (pr? e p?s treino) e repetidas no ?ltimo dia. Al?m destes momentos, CK e LDH foram mensuradas com 24 horas ap?s o esfor?o. PSE e SR foram coletadas todos os dias. A an?lise estat?stica utilizada foi a Anova Mista, com Post-Hoc de Bonferroni, considerando o n?vel de signific?ncia de 5%. Resultados: Observou-se intera??o significativa nos n?veis de CK (p=0,02), tempo (p=0,005) e para grupos nos dias 9 e 10 (p= 0,01). Para LDH houve diferen?a intragrupos (p=0,03) e intergrupos no dia 10 (p=0,03). N?o obtiveram diferen?as para as an?lises de desempenho neuromuscular nem para a PSE. Para a SR houveram diferen?as intragrupos (p=0,001) e intergrupos (P=0,033) para o quinto e sexto dia. Conclus?o: O uso acumulativo da crioterapia por imers?o atenua o dano muscular, n?o inibe o processo de adapta??o para melhora do desempenho e promove sensa??o de recupera??o. === Football is a sport with congested calendars, which requires recovery strategies such
as cold water immersion (CWI). This recovery technique is well spread through football
clubs, although it lacks a profound physiologic investigation to understand its effects on
athlete?s body. Objectives: The main objective of this study is to evaluate the effect of
a long-term CWI exposure in football athlete?s. Methodology: In order to answer this
question, we performed a randomized clinical trial in 23 sub-20 football athletes. All
subjects were randomly divided into two groups; a control group (10 minutes seated
rest) and a CWI group (10 minutes in a 10?C) during seven days in a row. We evaluated creatine kinase (CK) and lactate dehydrogenase (LDH) as molecular biomarkers for
muscle damage. The blood samples were collected on the first, second, ninth and tenth
days. Yet, we assessed the peak of muscle activity and isometric strength of the knee
flexors and extensors, potency of lower limbs, perceived exertion (PE) and total quality
recovery perceived (TQRPer) in order to understand the treatment physiological effect
on the subjects on the first and last day of experiments (before and after training).
Results: We found that CK is lower in the CWI group compared to control on the days
9 and 10 but not on the first applications. The LDH levels were different between groups
only on the last evaluation on the tenth day. We did not find any changes in the
neuromuscular performance or on the PE evaluation. Although, we found differences
in the TQRPer evaluation comparing CWI and control groups on the fifth and sixth days.
Conclusion: The long-term CWI exposure attenuates muscles damage, increase the
perceived recovery and doesn?t inhibit the process of adaptation necessary for the
performance improvement.
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