Rezaei Sajjad, Guerrero Rocio I, Kooima Parker, Kavoura Isabela E, Gopalakrishnan Sai Tejaswari, Long Clarissa E, Wardenaar Floris C, Siegler Jason C, Muñoz Colleen X, Kavouras Stavros A
Hydration Science Lab, College of Health Solutions, Arizona State University, Phoenix, AZ 85004, USA.
Athleat Field Lab, College of Health Solutions, Arizona State University, Phoenix, AZ 85004, USA.
Nutrients. 2025 Jul 24;17(15):2418. doi: 10.3390/nu17152418.
: This study examined the impact of a low-sugar flavored beverage on total fluid intake and hydration biomarkers during intermittent exercise in a hot environment among healthy children. : Twenty-one children (11 girls, 8-10 y) completed a randomized, crossover study with two trials. Each trial involved three bouts of 10 min walking, 5 min rest, 10 min walking, and 35 min rest for a total of 3 h in a hot (29.9 ± 0.6 °C) and dry environment (26 ± 7% relative humidity). Walking intensity was 69 ± 7% of age-predicted maximum heart rate. Participants consumed either plain water (W) or a low-sugar flavored beverage (FB). Body weight, fluid intake, urine samples, and perceptual ratings were collected. : Total ad libitum fluid intake was significantly higher with the FB (946 ± 535 mL) than with W (531 ± 267 mL; < 0.05). This difference was 128% higher for FB compared to W, with 19 out of the 21 children ingesting more fluids in FB versus W. Children rated the FB as more likable across all time points ( < 0.05). Net fluid balance was better with FB at 60, 70, 85, 135, and 145 min ( < 0.05), though not different at the 3 h mark. Urine volume was higher with FB (727 ± 291 mL) than with W (400 ± 293 mL; < 0.05). Urine osmolality was significantly higher in the W trial at 120 and 180 min ( < 0.05). : A flavored, low-sugar beverage enhanced ad libitum fluid intake and improved hydration markers compared to water during exercise in the heat, supporting its potential as a practical rehydration strategy for children.
本研究考察了低糖风味饮料对健康儿童在炎热环境中间歇性运动期间总液体摄入量及水合生物标志物的影响。21名儿童（11名女孩，8 - 10岁）完成了一项包含两项试验的随机交叉研究。每项试验包括三段10分钟步行、5分钟休息、10分钟步行以及35分钟休息，共计3小时，试验环境为炎热（29.9±0.6°C）且干燥（相对湿度26±7%）的环境。步行强度为年龄预测最大心率的69±7%。参与者饮用的要么是白水（W），要么是低糖风味饮料（FB）。收集了体重、液体摄入量、尿液样本及主观评分。与饮用白水（531±267毫升）相比，饮用低糖风味饮料（FB）时的随意总液体摄入量显著更高（946±535毫升；P<0.05）。与白水相比，低糖风味饮料的这一差异高出128%，21名儿童中有19名饮用低糖风味饮料时摄入的液体更多。在所有时间点，儿童对低糖风味饮料的喜爱程度更高（P<0.05）。在60、70、85、135和145分钟时，饮用低糖风味饮料的净液体平衡更好（P<0.05），不过在3小时时并无差异。饮用低糖风味饮料时的尿量（727±291毫升）高于饮用白水时（400±293毫升；P<0.05）。在120和180分钟时，白水试验中的尿渗透压显著更高（P<0.05）。与水相比，一种风味低糖饮料在热环境运动期间能增加随意液体摄入量并改善水合指标，支持其作为儿童实用补液策略的潜力。
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