Division of Human Environmental Science, Mount Fuji Research Institute, Yamanashi 4030005, Japan.
Department of Sports Medical Sciences, Shinshu University Graduate School of Medicine, Matsumoto 3908621, Japan.
Int J Environ Res Public Health. 2021 Feb 4;18(4):1441. doi: 10.3390/ijerph18041441.
We investigated whether bicarbonate ion (HCO) in a carbohydrate-electrolyte solution (CE+HCO) ingested during climbing to 3000 m on Mount Fuji could increase urine HCO retention. This study was a randomized, controlled pilot study. Sixteen healthy lowlander adults were divided into two groups (six males and two females for each): a tap water (TW) group (0 kcal with no energy) and a CE+HCO3 group. The allocation to TW or CE+HCO3 was double blind. The CE solution contains 10 kcal energy, including Na (115 mg), K (78 mg), HCO (51 mg) per 100 mL. After collecting baseline urine and measuring body weight, participants started climbing while energy expenditure (EE) and heart rate (HR) were recorded every min with a portable calorimeter. After reaching a hut at approximately 3000 m, we collected urine and measured body weight again. The HCO balance during climbing, measured by subtracting the amount of urine excreted from the amount of fluid ingested, was -0.37 ± 0.77 mmol in the CE+HCO3, which was significantly higher than in the TW (-2.23 ± 0.96 mmol, < 0.001). These results indicate that CE containing HCO supplementation may increase the bicarbonate buffering system during mountain trekking up to ~3000 m, suggesting a useful solution, at least, in the population of the present study on Mount Fuji.
我们研究了在攀登富士山至 3000 米的过程中，摄入含有碳酸氢根离子（HCO）的碳水化合物电解质溶液（CE+HCO）是否能增加尿液中 HCO 的保留量。这是一项随机、对照的初步研究。16 名健康的低地成年人被分为两组（每组 6 名男性和 2 名女性）：自来水（TW）组（无能量的 0 千卡）和 CE+HCO3 组。TW 或 CE+HCO3 的分配是双盲的。CE 溶液含有 10 千卡的能量，每 100 毫升含有 Na（115 毫克）、K（78 毫克）、HCO（51 毫克）。收集基线尿液并测量体重后，参与者开始攀登，同时使用便携式热量计每 1 分钟记录能量消耗（EE）和心率（HR）。到达大约 3000 米的小屋后，我们再次收集尿液并测量体重。通过从摄入的液体量中减去排出的尿液量来测量攀登过程中的 HCO 平衡，CE+HCO3 组为 -0.37 ± 0.77 mmol，明显高于 TW 组（-2.23 ± 0.96 mmol，<0.001）。这些结果表明，含有 HCO 的 CE 补充剂可能会在登山过程中增加碳酸氢盐缓冲系统，这表明至少在富士山本研究的人群中，这是一种有用的解决方案。
