Estimation of the Maximal Lactate Steady State in Endurance Runners

his study aimed to predict the velocity corresponding to the maximal lactate steady state (MLSSV) from non-invasive variables obtained during a maximal multistage running field test (modified University of Montreal Track Test, UMTT), and to determine whether a single constant velocity test (CVT), performed several days after the UMTT, could estimate the MLSSV. Within 4-5 weeks, 20 male runners performed: 1) a modified UMTT, and 2) several 30 min CVTs to determine MLSSV to a precision of 0.25 km . h(-1). Maximal aerobic velocity (MAV) was the best predictor of MLSSV. A regression equation was obtained: MLSSV = 1.425 + (0.756 center dot MAV); R-2 = 0.63. Running velocity during the CVT (V-CVT) and blood lactate at 6 (La-6) and 30 (La-30) min further improved the MLSSV prediction: MLSSV = VCVT + 0.503 - (0.266 center dot.La30-6); R-2 = 0.66. MLSSV can be estimated from MAV during a single maximal multistage running field test among a homogeneous group of trained runners. This estimation can be further improved by performing an additional CVT. In terms of accuracy, simplicity and cost-effectiveness, the reported regression equations can be used for the assessment and training prescription of endurance runners.