Efecto de la suplementación de creatina sobre marcadores de daño muscular y desempeño físico en atletas de voleibo

Given creatine supplementation may attenuate exer-cise-induced damage and directly influence the ATP-CP system, the purpose of the study is to assess the effects of creatine (Cr) supplementation on muscle damage markers; creatine kinase (CK) and lactate dehydrogena-se (LDH), late-onset muscle pain (DOMS) and physical performance in volleyball athletes. A controlled study with a double blind model was performed. Fourteen participants supplemented (0.3 g / kg) of creatine or placebo during (loading phase) and (0.1 g / kg) during (maintenance phase). Significant differences were ob-served in total plasma creatine concentration (p <0.05), body weight (p = 0.047) and lower pain perception (p = 0.020), 24 hours (p = 0.001), 48 hours (p <0.001) and 72 hours (p = 0.011) in the creatine group. The evaluation of subjective perception of pain verified a significant difference in the creatine group (p <0.05). It was con-cluded that creatine supplementation, associated with carbohydrate consumption, attenuated the perception of pain in volleyball players after the muscle damage protocol.Dado que la suplementación con creatina puede atenuar el daño inducido por el ejercicio e influir directamente en el sistema ATP-CP, el propósito del estudio es evaluar los efectos de la suplementación con creatina (Cr) sobre los marcadores de daño muscular como; creatina quinasa (CK) y lactato deshidrogenasa (LDH), dolor muscular de aparición tardía (DOMS) y rendimiento físico en atletas de voleibol. Se realizó un estudio controlado con modelo doble ciego. Catorce participantes suplementaron (0.3 g / kg) de creatina o placebo durante (fase de carga) y (0.1 g / kg) durante (fase de mantenimiento). Diferencias significativas fueron observadas en la concentración plasmática total de creatina (p <0.05), peso corporal (p = 0.047) y menor percepción del dolor (p = 0.020), 24 horas (p = 0.001), 48 horas (p <0.001 ) y 72 horas (p = 0.011) en el grupo creatina. La evaluación de la percepción subjetiva del dolor verificó diferencia significativa en el grupo creatina (p <0.05). Se concluyó que la suplementación de creatina, asociada al consumo de carbohidratos atenuó la percepción de dolor en los jugadores de voleibol después del protocolo de daño muscular.Actividad Física y Deport

Effect of creatine supplementation on muscle injury markers and physical performance in volleyball players

Entre os efeitos ergogênicos levantados pela literatura da creatina estão, aumento de massa muscular, capacidade antioxidante, efeito de tamponamento e redução da lesão muscular ocasionada por exercícios físicos. Visto que a suplementação de creatina pode atenuar danos induzidos pelo exercício físico e influenciar diretamente o sistema ATP-CP, predominante da modalidade de voleibol, o presente estudo propôs o uso da suplementação de creatina associada ao carboidrato durante sete dias, concomitante à realização de um protocolo de indução de dano muscular a fim de investigar a capacidade de manter a integridade da célula muscular por meio de marcadores de lesão muscular e avaliar sua influência no teste de desempenho físico. Foi realizado um estudo duplo cego, randomizado com 14 atletas de voleibol, no qual foi suplementado creatina ou placebo por um período de 7 dias (fase de carga) e 4 dias (fase de manutenção). Antes e após as fases de suplementação os atletas foram submetidos ao teste de desempenho físico e a coleta de sangue para avaliar concentrações de creatina quinase, creatina plasmática e lactato desidrogenase. Após a realização do protocolo de suplementação de creatina foi observado um aumento na concentração total de creatina plasmática, peso corporal e menor percepção de dor no grupo suplementado com creatina. Não foi encontrada diferença no desempenho de salto, potência relativa e marcadores bioquímicos de lesão muscular de ambos os grupos. Quanto a ingestão alimentar, foi observado um aumento no consumo de proteínas e gorduras. Concluiu-se que a suplementação de creatina associada ao carboidrato foi capaz de atenuar a percepção de dor em atletas de voleibol após protocolo de indução de lesão.Among the ergogenic effects raised by the literature of creatine are, increased muscle mass, antioxidant capacity, buffering effect and reduction of muscle injury caused by physical exercise. Since creatine supplementation may attenuate exercise-induced damage and directly influence the predominant volleyball ATP-CP system, the present study proposed the use of carbohydrate-associated creatine supplementation for seven days, concomitant with the performance of one muscle damage induction protocol to investigate the ability of creatine to maintain muscle cell integrity through muscle injury markers and to assess their influence on the physical performance test. A double-blind, randomized study with 14 volleyball athletes was performed with the supplementation of creatine or placebo for a period of 7 days (loading phase) and 4 days (maintenance phase). Before and after the supplementation phases, athletes underwent physical performance test and blood collection to evaluate concentrations of creatine kinase, plasma creatine and lactate dehydrogenase. After the creatine supplementation protocol an increase in plasma creatine total concentration, body weight and lower perception of pain in the creatine group was observed. No difference was found in the jump performance test, relative power and biochemical markers of muscle injury in both groups. Regarding food intake, there was observed an increase in protein and fat intake. In concluson, carbohydrate-associated creatine supplementation was able to attenuate the perception of pain in volleyball athletes after injury induction protocol

Effect of creatine supplementation on muscle damage markers and physical performance in volleyball athletes

Given that creatine supplementation may attenuate exercise-induced damage and directly influence the ATP-CP system, predominant in volleyball, the purpose of the study is to evaluate the effects of creatine (Cr) supplementation on muscle damage markers; creatine kinase (CK) and lactate dehydrogenase (LDH), delayed onset muscle soreness (DOMS) and physical performance in volleyball athletes.Fourteen volleyball players (under- 20 y) were divided into 2 groups: Creatine supplemented and Placebo. Double-blind controlled supplementation was performed using (0.3 g/kg) creatine or placebo for 7 days (loading phase) and (0.1 g/kg) for the next 4 days (maintenance phase). Before and after the supplementation phases, the players underwent Physical Performance Testing and blood sample collection to evaluate CK, LDH, and plasma creatine concentration.Dado que la suplementación con creatina puede atenuar el daño inducido por el ejercicio e influir directamente en el sistema ATP-CP, predominante en el voleibol, el propósito del estudio es evaluar los efectos de la suplementación con creatina (Cr) sobre los marcadores de daño muscular como creatina quinasa (CK) y lactato deshidrogenasa (LDH), dolor muscular de aparición tardía (DOMS) y rendimiento físico en atletas de voleibol. Se realizó un estudio controlado con modelo doble ciego, en el que catorce jugadores de voleibol (menores de 20 años) se dividieron en 2 grupos: creatina y placebo donde suplementaban (0.3 g/kg) de creatina o placebo durante 7 días (fase de carga) y 0.1 g/kg) durante los siguientes 4 días (fase de mantenimiento). Antes y después de cada fase de suplementación, los jugadores se sometieron a pruebas de rendimiento físico y recolección de muestras de sangre para evaluar CK, LDH y la concentración de creatina en plasma