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The running velocities associated to lactate minimum (V^ sub lm^), heart rate deflection (V^ sub HRd^), critical velocity (CV), 3 000 m (V^ sub 3000^) and 10 000 m performance (V^ sub 10km^) were compared. Additionally the ability of V^ sub lm^, and V^ sub HRd^ on identifying sustainable velocities was investigated. Twenty runners (28.5±5.9 y) performed 1) 3 000 m running test for V^ sub 3000^; 2) an all-out 500 m sprint followed by 6× 800 m incremental bouts with blood lactate ([lac]) measurements for V^ sub lm^; 3) a continuous velocity-incremented test with heart rate measurements at each 200 m for V^ sub HRd^; 4) participants attempted to 30 min of endurance test both at V^ sub lm^(ETV^ sub lm^) and V^ sub HRd^(ETV^ sub HRd^). Additionally, the distance-time and velocity-1/time relationships produced CV by 2 (500 m and 3 000 m) or 3 predictive trials (500 m, 3 000 m and distance reached before …