[The blood acid-base values of various qualifying groups of sportsmen in physiological condition and in exercise]

The acid-base parameters and buffer systems of blood of different qualifying groups of sportsmen in physiological condition and at physical work were studied. It is shown that initial differences of the acid-basic condition and buffer capacity of integral blood of sportsmen of high qualifying group lead to changes of the pH dynamics at raising concentration of lactate. Dynamics of the blood lactate concentration is analyzed at stepped-raising exercise in sportsmen of different qualification, the possible molecular mechanism of sharp increase in concentration of lactate in the blood is discussed. It is shown that the point of a break on a curve of change of the pH precedes a point of break on a curve of increase in concentration of lactate at physical work. The received results can be used for definition of the moment of approach of an anaerobic threshold with pH-measurement of the blood.