This study was designed to investigate the physiological effect of the practice of judo in terms of changes in urinary flow, urinary creatinine concentration, and urinary creatinine excretion after three typical judo practices (nagewaza, katamewaza, and uchikomi). The subjects were six male university judo practitioners aged from 18 to 20 years. The subjects performed a 10-minutes typical practice on separate days. All three typical practices, in the order of nagewaza, uchikomi, and katamewaza, brought about significant antidiuretic effects in quantitative terms but no diuretic effects on the subjects. These results indicate that the subjects performed the typical 10-minutes judo practices with less lactic acid oxygen debt than in the case of typical anaerobic exercises.
