فهرست مقالات caffeine

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  1 - The Effect of One Session of the Exhaustive Exercise & Caffeine Consumption on Muscle Fatigue Levels & Anaerobic Power of the Professional Female Karatekas
  Reza behdari Soudabeh   Ghasemi Seyed Kazem Mousavi Sadati
  10.61186/jspac.21058.1.2.16
  Background: The results of some research studies have revealed the positive effect of the caffeine consumption on the muscle fatigue and anaerobic power of the athletes. According to these findings, the purpose of the present research study is investigating the effect o چکیده کامل

  Background: The results of some research studies have revealed the positive effect of the caffeine consumption on the muscle fatigue and anaerobic power of the athletes. According to these findings, the purpose of the present research study is investigating the effect of one session of exhaustive exercise and caffeine consumption on muscle fatigue levels and anaerobic power of the professional female karatekas. Materials and Methods: In this experimental study, 30 professional female karatekas who had at least been present in the Karate national team selected camp once, were chosen based on the entrance criteria and the purposive sampling. The samples were randomly divided into three homogeneous groups consisting of 10 individuals (two groups receiving the 6 and 9 milligrams of caffeine supplement for each kilogram of body weight) and the placebo (6 milligrams of dextrose for each kilogram of body weight). The blood samples were taken prior to and after the anaerobic exhaustive test of Cunningham and Faulkner. The data were analyzed using analysis of covariance (ANCOVA). Results: The results of the study revealed that there was a significant difference between the control and 9-miligram caffeine groups in all variables (P0.005). Finally, the results of the study demonstrated that there was a significant difference resulting from the effect of 6 and 9-milligrams caffeine amounts on the levels of lactate, lactate dehydrogenase, creatine kinase, peak, average, anaerobic power and fatigue of the professional female karatekas (P0.005), though, there was no significant difference among the lactic acid, PH and the anaerobic power drop (P×0.005). Conclusion: According to the results of the study, it is recommended that female karatekas use the 9-miligram dosage caffeine supplement for reducing the levels of muscle fatigue and increasing the anaerobic power and blood PH. پرونده مقاله
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  2 - The effect of caffeine consumption on some factors of physical fitness and skills of young footballers
  pourya pazouki Abdolrasoul  Daneshjoo
  10.61186/jspac.38720.2.6.54
  Background: Caffeine is a supplement that is not yet fully effective in specific football training styles. The purpose of this study was to determine the effect of caffeine consumption on some of the physical fitness and skill factors of young footballers. Materials چکیده کامل

  Background: Caffeine is a supplement that is not yet fully effective in specific football training styles. The purpose of this study was to determine the effect of caffeine consumption on some of the physical fitness and skill factors of young footballers. Materials and Methods: The research method is quasi-experimental and the participants of this study were 30 football players aged 16-18 years who were randomly selected and randomly assigned to one of the three groups of caffeine consumption, placebo use and control (30 = n). The variables of lower limb strength, agility, speed, maximum oxygen consumption and pass, shoot and dribble football skills were considered as dependent variables in pre-test and post-test of all participants. Data were classified by descriptive indices of mean and standard deviation and data analysis was performed using repeated measures analysis of variance test using SPSS-23 software at a significance level of P <0.05. Results: The results of statistical test showed that between the average lower limb strength (sig = 0.001), maximum oxygen consumption (sig = 0.001), speed (sig = 0.001) and agility (sig = 0.002) There is a statistically significant difference in the caffeine group with the other two groups from the pre-test to the post-test, but there is no statistically significant difference between the control and placebo groups. The results also showed that there was a statistically significant difference between the mean performance of shot, pass and dribble football in the caffeine group with the other two groups from the pre-test to post-test (sig = 0.001), but between the control and placebo groups. There is no statistically significant difference. Conclusion: Based on the results of the present study, caffeine consumption can have a positive effect on the physical fitness and technical skills of young footballers. Therefore, football coaches are advised to use caffeinated beverages before training to improve their footballers' physical and skill factors. پرونده مقاله