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EP-07 Metabolism and Nutrition

Can Spontaneous Rehydration Prevent Weight Loss In A Junior Soccer Camp?


Egawa, Ken'ichi

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Medicine & Science in Sports & Exercise: August 2021 - Volume 53 - Issue 8S - p 299-300
doi: 10.1249/01.mss.0000762620.78318.a7
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PURPOSE: Drinking water improves weight loss during training. However adequate amount of water was not fully determined in elementary school children. The present study aims to examine the relationship between spontaneous rehydration and weight loss in elementary school players during a soccer training camp.

METHODS: The study participants included 22 boys and 2 girls from the Itsukaichi Comprehensive Sports Club in Akiruno, Tokyo. The body weight was determined using the InBody 230 system (Biospace Co., Tokyo, Japan) before and after the 2-hour practice. Two practices were done in the morning and in the afternoon. Drinking station was set beside the pitch in the morning practice, whereas children’s individual bottles were brought inside the pitch in the afternoon practice. Water intake was evaluated by examining the weight changes in individual bottles.

RESULTS: Mean (standard deviation, SD) of change in body weight was 0.06 (0.37) kg. It was - 0.39 (0.30) kg in the morning, and it was - 0.15 (0.24) kg in the afternoon, respectively. The mean (SD) of total water intake of the day was 956 (319) g. It was 367 (183) g in the morning, and it was 589 (177) g in the afternoon, respectively. Pearson's correlation coefficient between the change in body weight and total water intake of the day was 0.15 (p = 0.73) in the 2nd and the 3rd graders, and it was 0.58 (p = 0.02) in the 4th-6th graders, respectively.

CONCLUSIONS: Spontaneous rehydration was insufficient to compensate for weight loss in elementary school children during the training in the 2nd and the 3rd graders. To enhance water availability and sufficient opportunities to drink water inside the pitch may prevent weight loss in the 4th-6th graders. Therefore it was suggested that spontaneous rehydration inside the pitch was more effective than drinking station in elementary school children.

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