Abstract

Blood lactate disappearance in endurance-trained men (ET) and untrained men (UT) was investigated by application of recovery exercise with high relative intensity. Blood lactate was measured in five male long-distance runners as ET and in seven male relatively active students as UT, using a cycle ergometer (60 rpm). Two kinds of recovery exercise at 90 VO2max for 3 min. The rate of blood lactate removal was calculated by linear regression of time (min) against blood lactate (mmol/l-1) at 5, 10, 15 and 20 min during recovery exercise. Values of blood lactate at 10, 15 and 20 min during recovery exercise at 70 VO2max were significantly more reduced in ET than in UT. There was, however, no significant difference between ET and UT during recovery exercise at 40 VO2max. The rate A of blood lactate removal during 70 recovery exercise was significantly greater in ET than in UT but there was no significant difference in the rate between ET and UT during 40 recovery exercise. The rate B of blood lactate removal during 70 recovery exercise was significantly higher in ET than in UT, but there was no significant difference in the rate between ET and UT during 40 recovery exercise. In conclusion, the present data indicate that endurance-trained men possess more pronounced capability for blood lactate removal during recovery exercise at high relative intensity. Verf.-Referat