gf79 wrote:
Robergs doesnt state that lactic acid is not produced. It is well known that when lactic acid forms it is about 99% dissociated in the body, which means that the reaction is very quick and we are left with lactate and a proton. His argument is that lactate is not the cause of acidosis, but rather slows the acidosis process when formed. This hypothesis is controversial and one that i do not agree with. The Peter Stewart approach to acid-base regulation shows that H and OH ions are dependent variables, they are effected by changes from strong ions and weak ions in the body. The stong ion difference (SID) is the total difference between the positive ions and negative ions, as SID becomes more positive the body fluids become more alkaline, as SID becomes more negative the body fluids become more acidic. This approach is not widely understood, but reading the books makes a great deal of sense, but is much more difficult to understand than traditional pH. Lactate is a negative strong ion, as more lactate forms during exercise, the SID becomes more negative which causes an increase in H ions, which contribute to acidosis. The law of electrical neutrality shows that positive must equal negative ions in the body, so as both positive ions such as Sodium, Potassium, and Calcium form the SID increases, in order to maintain electrical neutrality there is an increase in negative Hydroxyl ions, when there are increase in negative ions such as chloride or lactate, then H ions increase to maintain electrical neutrality.
Robergs states very clearly that lactic acid is not produced.
http://ajpregu.physiology.org/cgi/content/full/289/3/R904