ABSTRACT
The main purpose of this study was to compare the effects of Carbohydrate and Carbohydrate-Protein supplements on heat shock protein 72[HSP72] during intermittent soccer activities. 24 soccer players of super clubs were selected and divided into 3 groups of carbohydrate [CHO], carbohydrate-protein [CHO-PRO] and placebo [P]. Intermittent activities included 24 trials of modified Ekblom tests or soccer simulation activities. Subjects ingested drinks before, during and 1 hour after intermittent activities. Blood samples were collected before [baseline], immediately, 1 hour and 24 hours after simulated intermittent activities. HSP72 levels, Insulin and blood Glucose counts, were measured using Elisa Kit. The results showed significant differences in HSP72 levels, Insulin and blood Glucose levels, immediately and 1 hour after intermittent activities of CHO and CHO-PRO groups compared to placebo group [p = 0 /05]. But, there was no significant difference between CHO and CHO-PRO group. In addition, significant increases in HSP72, Insulin and blood Glucose were shown immediately and 1 hour after intermittent activities in CHO-PRO, CHO and P compared to baseline. The results indicated that ingestion of carbohydrate with additional protein before, during and 1 hour after soccer simulation intermittent activities did not attenuate HSP72, Insulin and blood Glucose compared to when the carbohydrate was ingested alone. While, in both CHO-PRO and CHO groups significant differences were shown in HSP72, Insulin and blood Glucose levels compared to P group. Thus, glucose availability during exercise affects the circulating HSP72 response in soccer players
ABSTRACT
Creatine and sodium bicarbonate are energizer supplements used by sportsmen to reduce fatigue and increase power output in sprints - short, strenous excecises - such as rapid running and explosive movements.The purpose of this study was to compare the effects of creatine monohydrate, sodium bicarbonate and their combined administration on anerobic performance and blood lactate level in wrestlers. A group of 24 national Iranian junior male wrestlers with a mean age, height, weight and body mass index [BMI] of 17.7 +/- 4.76 years, 179.6 +/- 7.39cm, 1 +/- 9.94 kg and 23.17+1.92 kg/m[2], respectively, participated in this study. They all took a placebo for 2 days [20 g maltodextrin/day] and then completed six 10-second Wingate sprints, with a 60-second active rest between each 2. After a lapse of 10 days, the subjects were randomly assigned, on the basis of base power and body weight, to a creatine [Cr; 20g creatine/day], sodium bicarbonate [Sb; 0.065 g/kg sodium bicarbonate/day] or creatine-plus-sodium bicarbonate [Cr + Sb; 5g Cr + 0.065 g/kg sodium bicarbonate/day] supplement, using a double-blind design. They took the supplements and the placebo 4 times daily at 9 AM, noon [12'oclock], 6 PM and 10 PM and drank large amounts of water. In the next phase of the study, 2 days after taking the supplements/placebo, the Wingate tests [six 10-second tests] were repeated and relative peak powers [PP], relative mean power [MP] and fatigue index [FI] were assessed. Blood lactate was measured in a hand-finger blood sample before, immediately and 3 minutes after the last Wingate sprint. The data were analyzed, the statistical tests being repeated measures, t-test and ANOVA. An alpha of p = 0.05 was used to determine statistical significance. The data show statistically significant increases in PP, MP, and blood lactate level in the Cr+Sb, Cr and Sb supplement groups as compared to the placebo group [p = .05]. Also blood lactate level and fatigue index immediately and 3 minutes after the last Wingate sprint increased; however, no significant differences were found among Cr+Sb, Cr and Sb groups. It can be concluded that short-term consumption of Cr-Sb, Cr or Sb brings about a statistically significant increase to the same extent in both anaerobic power in Wingate 10 s-repeated performances and blood lactate level of wrestlers