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This study investigated differences in physiological and perceptual responses between  uke  and  tori  during intermittent  osaekomi-waza  exercise. Twenty-one male judo athletes voluntarily participated in this study. Following anthropometric measurements and 1 min uchi-komi test, athletes executed 20 s × 6 sets (1:½ work rest ratio) intermittent  osaekomi-waza  exercise with  kesa-gatame  as both  uke  and  tori . Athletes’ heart rate and lactate concentration were monitored at rest, 1 min, and 6 min following the exercise while the athletes classified the rate of perceived exertion just after the exercise. During the experiment, the changes in heart rate were different between positions with higher values in  uke  position compared to tori position after the intermittent exercise (F 2,40  = 4.28, p = 0.03). Moreover, athletes in the  uke  position stated a higher rating of perceived exertion than athletes in the  tori  position (p = 0.01). However, blood lactate responses were found to be similar between positions (p &gt; 0.05). Intermittent  osaekomi-waza  exercises resulted in similar metabolic load for  uke  and tori positions, while higher cardiovascular load was observed in the  uke  position compared to the  tori  position. Thus, it can be concluded that the athletes in  uke  position are exposed to more cardiovascular load compared to those in  tori  position and present higher perceptual responses.

Comparison of physiological and perceptual load between uke and tori after intermittent osaekomi-waza exercise in judo