TY - JOUR ID - 4040922 TI - Chronic lactate supplementation does not improve blood buffering capacity and repeated high-intensity exercise SP - 1231-1239 JF - Scandinavian Journal of Medicine & Science in Sports T2 - Scandinavian Journal of Medicine & Science in Sports VL - 27 IS - 11 AU - Oliveira, L. F. AU - de Salles Painelli, V. AU - Nemezio, K. AU - Goncalves, L. S. AU - Yamaguchi, G. AU - Saunders, B. AU - Gualano, B. AU - Artioli, G. G. PY - 2016 LA - English M3 - biological and medical sciences KW - load KW - load intensity KW - repetition method KW - ergogenic aid KW - nutrition KW - mineral KW - relation KW - performance KW - blood KW - rugby KW - combat sport KW - supplementation SN - 0905-7188 AB - Since there is conflicting data on the buffering and ergogenic properties of calcium lactate (CL), we investigated the effect of chronic CL supplementation on blood pH, bicarbonate, and high-intensity intermittent exercise performance. Sodium bicarbonate (SB) was used as a positive control. Eighteen athletes participated in this double-blind, placebo-controlled, crossover, fully counterbalanced study. All participants underwent three different treatments: placebo (PL), CL, and SB. The dose was identical in all conditions: 500 mg/kg BM divided into four daily individual doses of 125 mg/kg BM, for five consecutive days, followed by a 2-7-day washout period. On the fifth day of supplementation, individuals undertook four 30-s Wingate bouts for upper body with 3-min recovery between bouts. Total mechanical work (TMW) for the overall protocol and for the initial (1st+2nd) and final (3rd+4th) bouts was determined at each session. Blood pH, bicarbonate, and lactate levels were determined at rest, immediately and 5 min after exercise. CL supplementation did not affect performance (P > 0.05 for the overall TMW as well for initial and final bouts), nor did it affect blood bicarbonate and pH prior to exercise. SB supplementation improved performance by 2.9% for overall TMW (P = 0.02) and 5.9% in the 3rd+4th bouts (P = 0001). Compared to the control session, SB also promoted higher increases in blood bicarbonate than CL and PL (+0.03 ± 0.04 vs +0.009 ± 0.02 and +0.01 ± 0.03, respectively). CL supplementation was not capable of enhancing high-intensity intermittent performance or changing extracellular buffering capacity challenging the notion that this dietary supplement is an effective buffering agent. UR - http://doi.org/10.1111/sms.12792 DO - 10.1111/sms.12792 ER -