Using concentration capability test software, the authors tested the concentration capability of 18 excellent oriented cross - country racers, 26 ordinary oriented cross - country racers and 32 common students, and revealed the following findings : As for the excellent orientated cross - country racers, their concentration focusing and stabilizing capability is obviously superior to that of the ordinary oriented cross - country racers and common students; their range of concentration is wider than that of the common students, but not significa...