THE CHANGES IN URINARY ORGANIC ACIDS OF FEMALE HANDBALL PLAYERS AFTER 12-MINUTE RUNNING / 体力科学

ABSTRACT

Fourteen female handball players who were candidates for Olympic representative team were asked to run 12 minutes, and the relationship between the variation of the urinary components and the variations of the running speed and the heart beats was researched.<BR>The obtained results in short are in the following<BR>1) The covered distance of the 12-minute running was from 2, 385 meters to 3, 050 meters, and the average was 2, 830±196.6 meters.<BR>2) The heart beat rate quickly recovered for about 5 minutes after running, and then gradually reduced; after 30 minutes the rate was considerably higher than the level before the running in many cases.<BR>3) The urinary volume was obviously less after the running than that before it.<BR>4) The 1-hour after urine including the running time contained much pyruvates and lactates exhausted therein, and then the excretion amount reduced to the previous level. The ratios of Pyruvic acid/Creatinine and Lactic acid/Creatinine showed similar tendencies. The ratio of Pyruvic acid/Creatinine before the running against that after the running showed positive correlation with the running speed more than 230m/min., but showed a negative correlation clearly with the recovering rate of the heart beat after 30 minutes being higher than 60%. It suggests that the excretion of urinary pyruvate increase with more anaerobic factors for energy production under the conditions of the higher speed running and the larger oxygen debt.<BR>5) The urinary citrate obviously decreased just after the running, but in recovered considerably in the urine obtained after 2 hours. The ratio of Citric acid/Creatinine was low just after the running. The variations appears not to be simply due to the reduction of renal clearance.<BR>6) The urinary creatinine tended to reduce in the urine obtained 1-hour after the running, and particularly with the urinary pyruvate more than 50μg/ml there was observed clear negative correlation with creatinine which showed lower concentration with more anaerobic factors; it suggests some reduction of renal clearance.