The purpose of the study was to comparison the effect of sodium bicarbonate and dimethylglycine on biochemical blood parameters and anaerobic function in youth elite basketball players. Fifteen youth elite basketball players with 15 – 17 years old and 72.02 ±2.56 Kg divided into three groups: placebo group, sodium bicarbonate group and dimethylglycine group. During the study amount of 500 (m.l) solutions that content 300(m.g) sodium bicarbonate per/kg of body weight was given to the sodium bicarbonate group. In addition, the dimethylglycine group received a 400(m.g) dimethylglycine per/kg of body weight and third group received a 500(m.l) placebo solution. Blood samples was collection before and after of supplement administration and especially after of performance the Wingate test (30 second). Process of data gathering was analyzed by SPSS software. Results of the study shown that after administration of sodium bicarbonate and dimethylglycine supplements, blood lactate was increase but it finding statistically not significant (P>0/05). Nevertheless, after administration of sodium bicarbonate amount of extracellular bicarbonate buffers statistically was significant increase (P<0/05) and amount of pH was increase but it finding statistically not significant (P>0/05). In addition, none of biochemical and functional indexes for Dimethylglycine group statistically was significant. Collectively, ingestion of sodium bicarbonate in youth athletes significantly can increase blood-buffering capacity during high intensity interval exercises. Simultaneously, ingestion of sodium bicarbonate maybe due to increase in buffering capacity improves anaerobic capacity. In addition, administration of dimethylglycine supplement not improves anaerobic function in high intensity interval exercises.

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