نوع مقاله : مقاله پژوهشی
نویسندگان
1 کارشناس ارشد فیزیولوژی ورزشیکاربردی، دانشکده ادبیات و علوم انسانی، دانشگاه شهرکرد، شهرکرد، ایران.
2 استادیار گروه فیزیولوژی ورزشی، دانشکده ادبیات و علوم انسانی، دانشگاه شهرکرد، شهرکرد، ایران.
3 استاد گروه فیزیولوژی ورزشی، دانشکده ادبیات و علوم انسانی، دانشگاه شهرکرد، شهرکرد، ایران.
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Objectives: The aim of this study was to examine the effect of four weeks of beta-alanine supplementation alone and in combination with acute caffeine consumption on the specific performance of elite karate.
Methods: Thirty elite karate athletes participated in the study in three groups in a double-blind, randomized manner, with three supplementation conditions (beta-alanine, beta-alanine + caffeine, placebo) for four weeks. Beta-alanine was consumed at 4.6 grams per day, and caffeine was consumed acutely (3 mg per kilogram of body weight) one hour before the test. Performance was assessed using a specific karate aerobic test, vertical jump, and the Borg perceived exertion index. Additionally, blood lactate levels were measured before supplementation, and before and after the tests. Data analysis was performed using repeated-measures ANOVA.
Results: A significant improvement in performance was observed in the specific aerobic test and vertical jump in the beta-alanine (p<0.05) and beta-alanine+caffeine (p<0.05) conditions, while no significant difference was found in the Borg perceived exertion index across any of the groups. Lactate changes showed a significant decrease in the beta-alanine and combined groups (p<0.05). Results indicated that both beta-alanine alone and the combination of beta-alanine + caffeine led to a significant reduction in blood lactate concentration after the test (p<0.05). However, inter-group comparisons did not reveal any significant differences between these two conditions.
Conclusion: Chronic beta-alanine supplementation and its combination with acute caffeine supplementation improve the specific performance of elite karate athletes, although no effect was observed on reducing perceived exertion during exercise.
کلیدواژهها [English]
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