مرکز منطقه ای اطلاع رسانی علوم و فناوری Journal of Sports Physiology and Athletic Conditioning 2783-3038 4 14 2025 3 16 The effect of beta-alanine supplementation and exhaustive activity on carnosine levels, pH, blood lactate and muscle strength of male judo athletes The effect of beta-alanine supplementation and exhaustive activity on carnosine levels, pH, blood lactate and muscle strength of male judo athletes 27 36 en Reza Behdari دانشگاه قاضی-آنکارا- ترکیه Ahmad Abdolmaleki 2024 8 18 <p><strong>Background:</strong> Beta-alanine supplementation is a precursor to carnosine, which increases intramuscular carnosine, and the buffering effect may reduce lactic acid accumulation and improve performance. This study investigated the effect of beta-alanine supplementation during exhaustive exercise on carnosine levels, pH, blood lactate, and muscle strength in male judoka athletes.</p> <p><strong>Materials and Methods:</strong> 20 judo athletes (mean age 23.26 &plusmn; 3.07, body mass index 23.12 &plusmn; 2.05) were purposively selected based on inclusion and exclusion criteria, and then the subjects were randomly divided into two groups of 10 people consuming beta-alanine and a placebo group. Performance testing and blood tests were performed before and after exhausting activity (chest press and leg press) with an intensity of 70 to 75% of 1RM in three sets until exhaustion in both groups. The day after the pre-test, supplementation and placebo were started at 6 grams per day at specified hours for 4 weeks, and the post-tests were re-evaluated after the end of the period. A statistical method was used via SPSS21 software. The Shapiro-Wilk test and covariance analysis with a significance level of 0.05 were used to analyze the data.</p> <p><strong>Results:</strong> There was no significant difference between the two groups of beta-alanine and placebo supplementation in performance indicators (P&gt;0/05).</p> <p><strong>Conclusion:</strong> Co Finally, the results of the study showed that beta-alanine supplementation during the study period improved carnosine levels and reduced blood lactate levels after exhaustive exercise, and may have long-term beneficial effects on performance in professional male judokas.</p> <p>&nbsp;</p> http://jspac.etb.iau.ir/en/Article/Download/48986