Department of Ergonomics, Central Institute for Labour Protection-National Research Institute, Czerniakowska St. 16, 00-701 Warsaw, Poland.
Department of Tourism and Recreation, Józef Piłsudski University of Physical Education, Marymoncka St. 34, 00-968 Warsaw, Poland.
Int J Environ Res Public Health. 2022 May 5;19(9):5627. doi: 10.3390/ijerph19095627.
The aim of this study was to determine the effects of different seasons of the year and the time of day (before work vs. after work) on hydration status in men. The study involved sixty foresters who spent most of the work outdoors. During three seasons of the year (summer, autumn, and winter), indices of hydration status (body mass (BM) and percentage change of BM, total body water (TBW) and percentage change of TBW, serum osmolality (Sosm) and percentage change of Sosm, urine osmolality, urine-specific gravity (USG), urine color, and thirst) were determined before work on the first day (time point 1 used as baseline), immediately after work on the first day (time point 2), and before work on the following day (time point 3). USG decreased at time point 2 compared to time point 1 (p < 0.001) and time point 3 (p = 0.03). At time point 2 (p = 0.002) in winter and time point 3 in autumn (p = 0.049), serum osmolality was higher than in summer. In conclusion, the differences in hydration status depended on the time of day and season. A large percentage of foresters come to work inadequately hydrated, especially in colder seasons compared to summer.
本研究旨在确定一年中不同季节和一天中的时间（工作前与工作后）对男性水合状态的影响。研究对象为 60 名林业工人，他们大部分时间都在户外工作。在一年中的三个季节（夏季、秋季和冬季）中，在工作前的第一天（作为基线的时间点 1）、第一天工作结束后立即（时间点 2）和第二天工作前（时间点 3）测定水合状态的指标（体重（BM）和 BM 的百分比变化、总体水（TBW）和 TBW 的百分比变化、血清渗透压（Sosm）和 Sosm 的百分比变化、尿渗透压、尿比重（USG）、尿色和口渴）。与时间点 1（p<0.001）和时间点 3（p=0.03）相比，时间点 2 的 USG 降低。在冬季的时间点 2（p=0.002）和秋季的时间点 3（p=0.049），血清渗透压高于夏季。总之，水合状态的差异取决于一天中的时间和季节。与夏季相比，大量林业工人在较冷的季节来上班时水合状态不佳。
