Montana Center for Work Physiology and Exercise Metabolism, The University of Montana, Missoula, Montana (Mr Rosales, Mr Dodds, Mr Marks, and Dr Ruby); National Technology and Development Program, United States Department of Agriculture Forest Service, Missoula, Montana (Mr Sol and Dr Domitrovich).
J Occup Environ Med. 2021 Nov 1;63(11):963-969. doi: 10.1097/JOM.0000000000002285.
Document wildland firefighters (WLFFs) hydration status during a singular workshift (13.7 ± 1.4 hours).
WLFF researchers documented real-time WLFF (n = 71) urine metrics and fluid consumption. Body weight and blood samples (n = 25) were also collected. Two-tailed dependent t tests determined statistical significance (P < 0.05).
Body weight significantly decreased (-0.3 ± 1.1%, P > 0.05). Fluid consumption totaled 6.2 ± 2.3 L including food and 5.0 ± 2.1 L without food. Morning versus afternoon urine frequency (2.6 ± 1.3, 3.1 ± 1.9 voids), urine volume (1.2 ± 0.7, 1.3 ± 0.8 L), urine volume per void (440 ± 157, 397 ± 142 mL), and urine specific gravity (1.010 ± 0.007, 1.010 ± 0.007) were not significantly different (P > 0.05). Pre- to post-workshift serum chloride (103.2 ± 1.9, 101.4 ± 1.7 mM) and blood glucose (5.2 ± 0.4, 4.5 ± 0.7 mM) significantly decreased (P < 0.05), while serum sodium (141.5 ± 2.4, 140.8 ± 2.0 mM) and serum potassium (4.3 ± 0.3, 4.2 ± 0.3 mM) remained stable (P > 0.05).
WLFFs can ingest fluid and food amounts that maintain workshift euhydration and electrolyte status.
记录单个轮班（13.7±1.4 小时）中野外消防员（WLFF）的水合状态。
WLFF 研究人员实时记录 WLFF（n=71）的尿液指标和液体摄入量。还采集了体重和血液样本（n=25）。双尾依赖 t 检验确定了统计学意义（P<0.05）。
体重明显下降（-0.3±1.1%，P>0.05）。液体总摄入量为 6.2±2.3L，包括食物和 5.0±2.1L 不包括食物。与下午相比，早上的排尿频率（2.6±1.3，3.1±1.9 次）、尿量（1.2±0.7，1.3±0.8L）、每次排尿量（440±157，397±142mL）和尿比重（1.010±0.007，1.010±0.007）无显著差异（P>0.05）。工作前后血清氯（103.2±1.9，101.4±1.7mM）和血糖（5.2±0.4，4.5±0.7mM）显著降低（P<0.05），而血清钠（141.5±2.4，140.8±2.0mM）和血清钾（4.3±0.3，4.2±0.3mM）保持稳定（P>0.05）。
WLFF 可以摄入维持轮班期间水合状态和电解质平衡的液体和食物量。
