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| Format: | Artículo científico |
| Language: | en |
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Universidade Iguaçu
2008
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| Online Access: | https://www.redalyc.org/articulo.oa?id=93021618002 |
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Table of Contents:
- MISCONCEPTIONS: BICARBONATE AS AN ERGOGENIC AID? A PHYSICAL, CHEMICAL, MECHANISTIC VIEWPOINT. Bartholomew Kay Salud ATOT SID+ Lactate Muscle pH Stewart model KAY, B. Misconceptions: Bicarbonate as an ergogenic aid? A physical, chemical, mechanistic viewpoint. Brazilian Journal of Biomotricity, v. 2, n. 4, p. 205-219, 2008. The ergogenic effect of sodium bicarbonate has been extensively studied. Results have been equivocal. Bicarbonate (HCO3 -) is widely proposed as having a possible ergogenic effect via an attenuation of exercise induced acidification, and / or via increased rapidity of lactate export from working muscles. Lactate is cited as being co-exported with protons, in a 1:1 stoichiometry. With respect to the model proposing bicarbonate as an ergogenic aid: (a) exercise induced acidosis may not be deleterious to exercise performance; (b) both [HCO3 -] and [H+] are dependant variables and therefore unable to be primarily or independently moderated; (c) The finding that ingestion / infusion of NaHCO3 results in increased lactate export rate from working muscles is not universal (d) whether or not protons are co-exported from muscle cells with lactate is irrelevant to [H+] in either case; and finally (e) lactate is not apparently causally involved in muscle fatigue development. Rather, exercise leads to accumulation of extracellular K+ and intracellular Na+ which may disturb the fluid balance of cells, and the continuing excitability of cells. In conclusion, the current author suggests that the likely ergogenic agent is the Na+, rather than the HCO3 -; which may operate by mitigating such osmotic and ionic perturbations. The ergogenic affect of Na+ appears from an initial investigation, to be maximised when administered with bicarbonate; as opposed to with chloride, citrate, or lactate. 2008 artículo científico 1981-6324 https://www.redalyc.org/articulo.oa?id=93021618002 en http://www.redalyc.org/revista.oa?id=930 Brazilian Journal of Biomotricity application/pdf Universidade Iguaçu Brazilian Journal of Biomotricity (Brasil) Num.4 Vol.2