Wong Stephen Heung-Sang, Sun Feng Hua
Dept. of Sports Science and Physical Education, Chinese University of Hong Kong, Hong Kong, China.
Pediatr Exerc Sci. 2014 May;26(2):177-86. doi: 10.1123/pes.2013-0080.
The purpose of the current study was to examine the effect of flavor on voluntary drinking and thermoregulatory responses in Chinese boys and girls exercising intermittently in a hot environment. Fourteen boys and girls (9 to 11 years old) performed four 3-hour intermittent exercise sessions (20-min walking sessions at 50% VO2peak followed by a 25-minute rest period) in a hot and humid environment (~30 °C ambient temperature and ~70% relative humidity). The participants consumed 1 of 4 beverages ad libitum in a randomized sequence by using a Latin-square principle: unflavored water (W), orange-flavored water (OF), lemon-flavored water (LF), and grape-flavored water (GF). No differences were observed in the total fluid intake (W vs. OF vs. LF vs. GF: Boys, 441 ± 114 vs. 493 ± 106 vs. 387 ± 83 vs. 568 ± 146 ml; Girls, 613 ± 131 vs. 923 ± 204 vs. 825 ± 157 vs. 790 ± 166 ml), urine and sweat output, and physiological perceptual variables among trials and between sexes. The results suggested that Chinese children can maintain body fluid balance while exercising moderately in a hot and humid environment by ad libitum drinking. The flavor of the beverages had no impact on the voluntary drinking and the state of hydration in the current study.
本研究的目的是考察在中国男孩和女孩于炎热环境中进行间歇性锻炼时，口味对其自主饮水及体温调节反应的影响。14名男孩和女孩（9至11岁）在炎热潮湿的环境（环境温度约30°C，相对湿度约70%）中进行了4次为时3小时的间歇性锻炼（每次锻炼包括以50%最大摄氧量进行20分钟步行，随后休息25分钟）。参与者按照拉丁方原则以随机顺序随意饮用4种饮料中的一种：无调味水（W）、橙味水（OF）、柠檬味水（LF）和葡萄味水（GF）。在总液体摄入量（W组与OF组与LF组与GF组：男孩，441±114 vs. 493±106 vs. 387±83 vs. 568±146毫升；女孩，613±131 vs. 923±204 vs. 825±157 vs. 790±166毫升）、尿液和汗液排出量以及各试验之间和不同性别之间的生理感知变量方面，未观察到差异。结果表明，中国儿童在炎热潮湿环境中适度锻炼时，通过随意饮水能够维持体液平衡。在本研究中，饮料的口味对自主饮水和水合状态没有影响。
