Abstract des Autors

A new method for assessment of anaerobic capacity is presented. It consists of two treadmill runs at 22 km/h and 7.5 slope, the first one being interrupted after 40 s (submax. test), the second continuing until volitional exhaustion (max. test). Measured variables are the increase in arterial lactate concentration over the pre-exercise value in the submax. test (delta L40), the maximal arterial lactate level in the max. test (Lmax), and time to exhaustion (tmax). Fifty-five male runners of high competitive level were examined with this procedure, including 400-m runners of differing performance capacity, middle-distance, long-distance, and marathon runners. The differences in delta L40, most likely reflecting differences in high energy phosphate utilization, suggest that excellent performance in any running event is associated with increased alactacid anaerobic capacity. Lmax, reflecting lactacid anaerobic capacity, was the single most important determinant of running time, though its correlation with tmax was far from being perfect. Correlation and regression analysis revealed that delta L40 and Lmax account for 87 of the variability of tmax, indicating a high specificity of this procedure.