عنوان

تأثیر مکمل‌سازی کوتاه‌مدت بتاآلانین بر عملکرد و میزان لاکتات خون متعاقب یک جلسه آزمون تخصصی در کشتی‌گیران دانشگاهی

متن يادداشت

Wrestling is at anaerobic sports that impacts high pressure to body metabolic systems. The acid lactic system is dominant energy system in wrestling. Increasing the acid lactic cause decreasing blood pH and impairment in energy systems. So sports supplements which can buffering produced lactate in muscles, may enhancing wrestlers' performance. Beta-alanine is one of the supplements that result in decreasing blood lactate level with buffering the acid lactic. The aim of present study was to investigate the effect of seven days' beta-alanine supplementation on values of blood lactate, pH, blood sugar, heart rate, blood pressure, perceived exertion and performance of young wrestlers following physical fitness test. Methodology: This study was designed in a semi-experimental design with repeated measurements and double-blind basis including two groups: supplementation (n=9) and placebo group (n=7). Volunteered wrestlers were randomly divided in two homogenous groups in according to age (21.751.77), height (174.04 7.72), weight (73.19 12.24), body fat percentage (12.91 5.22), strength (1RMs of bench press and leg press) and RAST test (anaerobic power) and 2 years wrestling experience and participating in collegiate and club competition and wrestling techniques. Blood samples (stage 1 and 2),were taken heart rate and blood pressure were measured performed 30 minutes before and immediately after specialized test for wrestling. After seven days' beta-alanine supplementation (0.06 g per body kg) with the wrestling common practices, the second test was performed similar to the first test and blood samples (stage 3 and 4) were collected. Analyses of variance (ANOVA) and Bonferroni post hoc tests were used for data statistical analysis (at significant level p>0.05). Results: Results showed that the lactate concentration of blood plasma significantly decreased in supplement group (p=0.007) compare to the placebo group after seven days Beta-alanine supplementation (second test), but there was no significant difference between groups (p >0.05) in blood glucose, pH, the executive skills counts and quality, perceived exertion, blood pressure and heart rate, although have positive changes in some variables, were not significant (p >0.05). Conclusion: Beta-alanine short-term supplementation reduces blood's lactate production but does not affect the performance of the wrestlers