Lactate and sports.

ABSTRACT

Blood lactate level was determined in two groups of athletes consisting of 12 male runners and 13 male swimmers. Before their performances, blood lactate level was 1.51 + 0.35 mM/L and within 5 minutes after 400 metre speedy running and 100 metre speedy swimming the levels had risen to 13.07 + 2.98 and 12.71 + 2.11 mM/L. Blood lactate level decreased within 30 minutes after exercise and the level were analysed under 3 different resting condition oxygen inhalation, normal saline solution ingestion, and normal resting, were 5.68 + 1.49, 5.26 + 1.68, and 6.3 + 1.63 mM/L, respectively. There was no statistically significant difference in blood lactate level between the two groups of athletes, and among the three condifions of resting. These data suggest that workload done by 400 metre speedy running is equivalent to 100 metre speedy swimming. Oxygen inhalation or saline solution ingestion after exercise does not cause any better benefit to blood lactate removal than normal resting.