The effects of warming-up on the blood lactate kinetics during exercise.
- VernacularTitle:運動中の血中乳酸動態に対するウォーミング・アップの影響
- Author:
SHINJI GOTO
;
HARUO IKEGAMI
- Publication Type:Journal Article
- Keywords:
warming-up;
blood lactate;
constant load exercise
- From:Japanese Journal of Physical Fitness and Sports Medicine
1987;36(2):78-84
- CountryJapan
- Language:Japanese
-
Abstract:
The present investigation was designed to examine the effects of warming-up (W-up) on the blood lactate kinetics during 5 minutes of pedaling exercise. Five healthy male adults were the subjects. The intencity of the criterion task (CT) was about 80% VO2max, and that of the W-up was a work load corresponding to the anaerobic threshold. Between W-up and CT there were five-minute rest periods on the bicycle ergometer. In order to determine the blood lactate values, blood samples were taken from the antecubital vein at the following times: rest, pre-CT, and 3, 5, 7, and 30-minutes after CT. Expired gas was analysed continuously for the calculation of VO2, VCO2, R, VE. The heart rate was recorded every min-ute from ECG.
Blood lactate values increased 3.23±0.91 mmol/l after W-up, a significant increase over the resting values. The peak blood lactate during the W-up experiment (4.62±0.84 mmol/l) was significantly lower than that of the control experiment (6.48±1.69 mmol/l) . Differences in lactate before and after CT (ΔLa) was found to be significantly lower in experiments with W-up (1.39±0.99 mmol/l) as compared with control experiments (5.37±1.62 mmol/l) . In one subject, the blood lactate levels decreased during CT after W-up, while lactate levels increased during CT without W-up. VO2 during CT were very similar in both experiments. These results indicate that this kind of W-up delays the rate of blood lactate accumulation during CT.
