What does the research say about carnosine synthesis and muscular performance?
Two recent clinical studies have indicated that carnosine is preferentially concentrated in the Type II muscle fibers. This is even more apparent in the Type IIx fibers, which provide the fast-twitch muscle characteristics needed to propel world-class sprinters like Maurice Greene. Or, better stated to those who lift weights, Type II muscle fibers are what most of the top professional bodybuilders have more of, versus Type I fibers. This, in theory, might be why it could be easier for them to build faster, larger, and more muscular bodies than the rest of us.