The Blood Lactate During Recovery from Sprint Runs

Abstract

A ndersen , K. L ange , A. B olstad and S. S and . The blood lactate during recovery from sprint runs. The time required to restore the normal resting level of blood lactate after runs of distances up to 800 metres was determined. The recovery time increases as the distance becomes longer and up to a limit of about 400 m. Longer runs do not increase the recovery time for blood lactate. Running 400 m is also sufficient to produce the maximum blood lactate, which in this study was found to range from 120 to 150 mg %. Determination of pulmonary ventilation during recovery was undertaken, and it was found that pulmonary ventilation reached stable values of about resting level long before the excess lactic acid was removed from the blood. Measurement of O 2 , ‐debt after the runs revealed a larger debt for an athlete than for a non athlete, and evidence was found indicating a greater “alactic” O 2 , ‐debt in the athlete than in the non athlete.