Jianfen Zhang, Na Zhang, Junbo Lu, Shufang Liu, Yongwei Lin, Guansheng Ma
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引用次数: 0
Abstract
Background: Water intake and hydration status have been reported to fluctuate throughout the year. This study investigated seasonal fluctuations of total water intake and hydration status among young adults in Baoding, China.
Methods: This prospective cohort study enrolled 82 young adults aged 18-23 years in Baoding, China. Total drinking fluids consumed and water from food were assessed, and the osmolality and electrolyte concentrations of 24-h urine and fasting blood samples were determined. Differences among the four seasons were compared by mixed linear models, followed by determinations of least-significant differences (LSD), with spring used as the reference.
Results: Seventy-nine participants (43 men and 36 women) completed the study. Total water intake (TWI) was 359 ~ 429 mL higher in spring and summer than in autumn and winter and was 116 mL higher in summer than in winter (all p < 0.05). Chinese recommendations for TWI were met by 13.9% to 22.8% of participants, and recommendations for total fluid intake were met by 10.1% to 16.5%, but these differences were not statistically significant (p > 0.05). Urinary and plasma biomarkers differed significantly among the four seasons (p < 0.05), with osmolality and urine specific gravity (USG) being significantly higher in summer than in other seasons (p < 0.05). The percentage of participants with optimal hydration status increased from 38.0% in summer to 62.0% in spring (p < 0.05). Men had more concentrated urine as well as higher plasma osmolality and solute concentrations than women during each season of the year (p < 0.05).
Conclusion: TWI and urinary and plasma biomarkers of hydration were found to vary seasonally among Chinese young adults, with hydration status being poorer in summer. Men need to pay more attention than women to maintain optimal hydration status.
背景：据报道，水的摄入量和水合状态在全年波动。本研究调查了中国保定年轻人总饮水量和水合状态的季节性波动。方法：这项前瞻性队列研究在中国保定招募了82名年龄在18-23岁 的年轻人。评估了所消耗的总饮水量和食物中的水分，并测定了24小时尿液和空腹血液样本的渗透压和电解质浓度。采用混合线性模型比较四季间的差异，并以春季为参照，确定最小显著差异（least-significant Differences， LSD）。结果：79名参与者（43名男性和36名女性）完成了研究。春、夏季总摄水量（TWI）比秋、冬季高359 ~ 429 mL，夏季比冬季高116 mL （p均为 p > 0.05）。尿液和血浆生物标志物在四个季节之间差异有统计学意义（p p p 0.05）。在一年中的每个季节，男性的尿液浓度、血浆渗透压和溶质浓度都高于女性（p 0.05）。结论：中国年轻人的TWI、尿液和血浆水合生物标志物存在季节性差异，夏季水合状态较差。男性需要比女性更注意保持最佳的水合状态。临床试验注册：https://www.chictr.org.cn/showproj.html?proj=124857, ChiCTR2100045268。
期刊介绍：
No subject pertains more to human life than nutrition. The aim of Frontiers in Nutrition is to integrate major scientific disciplines in this vast field in order to address the most relevant and pertinent questions and developments. Our ambition is to create an integrated podium based on original research, clinical trials, and contemporary reviews to build a reputable knowledge forum in the domains of human health, dietary behaviors, agronomy & 21st century food science. Through the recognized open-access Frontiers platform we welcome manuscripts to our dedicated sections relating to different areas in the field of nutrition with a focus on human health.
Specialty sections in Frontiers in Nutrition include, for example, Clinical Nutrition, Nutrition & Sustainable Diets, Nutrition and Food Science Technology, Nutrition Methodology, Sport & Exercise Nutrition, Food Chemistry, and Nutritional Immunology. Based on the publication of rigorous scientific research, we thrive to achieve a visible impact on the global nutrition agenda addressing the grand challenges of our time, including obesity, malnutrition, hunger, food waste, sustainability and consumer health.
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