Abstract An interrelation between the redox potential of venous blood and its biochemical characteristics is inferred from a statistical analysis using the BASIC software ANACONDA, a Factor Correspondence Analysis (FCA) algorithm implemented in the M.I.S. laboratory. FCA is an appropriate technique for graphically exploring contingency tables. A MacSpin procedure was used to produce the three-dimensional scatter plot and to rotate three-dimensional displays. This statistical investigation was used to study physiological state evolution of 46 trained athletes ranging to age from 18 to 21, during an incremental exercise test to exhaustion on a cycle ergometer. The redox potential of venous blood is a resultant parameter used mainly to judge the physiological state of an individual. The use of this parameter to predict maximal effort performance is discussed.