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Aim – We measured in this work the plasma lactate concentrations in male sprinters competing at national level after repetitions of 50 m sprint at maximal speed on the track.Results – Plasma lactate concentration increases significantly after the first repetition of sprint, from 3.9 ± 0.1 mmol.l−1 before the first sprint to 14.0 ± 3.0 mmol.l−1 observed after the 3th repetition.Discussion and conclusion – Our results confirmed that the activity of the lactic anaerobic metabolism reflected by plasma lactate concentration is very high during the first seconds of sprint exercises below seven seconds. Sprint coaches must take into account these data when they program sprint sessions. [Copyright &y& Elsevier]