Eight high-level male judo athletes voluntarily participated in this study. Body mass and urinary measures of hydration status were collected a week before, at the official weigh-in and 24-hour post-weigh-in.
The one-way repeated-measures ANOVA showed a significant main effect of time on body mass (p < 0.001). Body mass decreased by 5.4 ± 0.7 kg or 6.8% from a week before the competition to official weigh-in (p < 0.001) and increased by 3.0 ± 1.1 kg or 4.2% from official weigh-in to 24-h post-competition (p < 0.001). A significant effect of time was also found in both urine-specific gravity (USG) (p < 0.001) and urine color (UC) among the measurements (p = 0.001). Athletes\' USG values were at the highest level (USG = 1.030 ± 0.001) at the official weigh-in, while they decreased significantly at 24-hour post-competition (USG = 1.017 ± 0.007).
The results showed that elite judo athletes resort to rapid weight loss and present dehydration despite established regulations by the IJF.
■8名高水平男子柔道运动员自愿参加本研究。一周前收集身体质量和尿液的水合状态测量值,在官方称重和24小时称重后。
■单向重复测量方差分析显示时间对体重的显着主要影响(p<0.001)。从比赛前一周到正式称重,体重下降了5.4±0.7kg或6.8%(p<0.001),从正式称重到比赛后24小时增加了3.0±1.1kg或4.2%(p<0.001)。在测量结果中,在尿比重(USG)(p<0.001)和尿颜色(UC)(p=0.001)中也发现了时间的显著影响。运动员的USG值在官方称重时处于最高水平(USG=1.030±0.001),而在比赛后24小时显着下降(USG=1.017±0.007)。
■结果表明,尽管IJF制定了规定,但优秀的柔道运动员还是会迅速减肥并出现脱水。