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and AAA performed the literature search, performed quality assessment, and coded the studies. JWK devised and carried out the statistical analysis. All authors took part in writing the manuscript. All authors read and approved the final manuscript.”
“Background During intensive anaerobic exercise MK-0457 in vivo with a large glycolytic component, one major cause of fatigue is believed to be acidosis caused by high levels of hydrogen ions (H+) in the muscle fibers. The increase in (H+) corresponds to a decrease in muscle and blood pH , can
slow glycolysis , interfere with calcium release from the endoplasmic reticulum and calcium ion binding [3, 4], and increase the perception of fatigue after some types of exercises . A number of buffers can be used by the body, but the primary method for buffering the H+ is thought to be either bicarbonate or hemoglobin . For the past 35 years, several studies have investigated the use of sodium bicarbonate (SB) as an ergogenic aid. The participants have typically been men, and efficacy (improved performance and a decrease in H+ concentration after exercise) has generally been seen at doses of at least 0.3g· kg-1 body mass [7–9]. A recent meta-analysis by Carr et al.  suggests that ingestion of SB at 0.3 – 0.5g·kg-1 body mass improves mean power learn more by 1.7 ± 2.0% during high-intensity
races of short duration (1–10 min). Timing of ingestion ranging from 60 min – 180 min before exercise did not influence buffering capacity or the ergogenic potential of SB (0.3g·kg-1 body mass) as assessed by repeated sprint ability. However, visual analog scale scores indicated that at 180 minutes post-ingestion, an individual is less prone to experiencing significant gastrointestinal discomfort . Gao et al.  and Siegler et al.  have demonstrated that swimmers ingesting 0.3g·kg-1 body mass of SB can enhance blood buffering potential and positively influence interval swim performance. Lindh and colleagues  have also shown that SB supplementation (0.3g·kg-1 body mass) can improve a single 200 m freestyle performance time in elite male competitors, most likely by increasing extra-cellular buffering capacity. Beta-alanine (BA) is a non-essential amino acid that combines with L-histidine, to form the dipeptide carnosine. BA is thought to be the rate-limiting step in the synthesis of carnosine .