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最終更新日：2026/06/18
西牧 未央
ニシマキ ミオ
(Mio Nishimaki)
論文
- タイトル
- タイトル（英）
- Effects of Carbonated and Electrolyte-Added Water on Body Fluid Regulation and Ingestive Behavior During Ad Libitum Rehydration Following Mild Hypohydration
- 参照URL
- https://researchmap.jp/mionishimaki/published_papers/53935597
- 著者
- 著者（英）
- Akira Takamata,Natsumi Kosugi,Nanako Sakagawa,Aoi Takahashi,Fuka Nishino,Mio Nishimaki,Yasushi Tanaka,Makoto Kobayashi,Chihiro Nitta,Moeno Aihara,Yuka Hasegawa,Motoko Kobayashi,Takanobu Takihara
- 担当区分
- 概要
- 概要（英）
- Purpose: Maintaining fluid homeostasis is crucial, and replenishing electrolytes—particularly sodium (Na+)—is critical for effective rehydration after thermal hypohydration. Despite the growing consumption of carbonated water (CW), its impact on post-hypohydration body fluid balance, either alone or combined with electrolytes, remains inadequately investigated. Therefore, this study was designed to examine the separate and interactive effects of carbonation and electrolyte provision in rehydration fluids—utilizing a 2 × 2 factorial design (carbonation × electrolytes)—on ingestive behavior and systemic fluid balance following mild thermal stress-induced hypohydration. Methods: Subjects (eight women and seven men, age range: 19–25 years) were dehydrated by performing three bouts of stepping exercise for 20 min, separated by 10 min of rest, at 25 °C. Following the dehydration protocol, subjects ingested pure water (W), CW (gas volume, 3.43 ± 0.20 (mean ± standard deviation)), electrolyte-added water (EW), or electrolyte-added CW (ECW) (gas volume, 3.04 ± 0.29 (mean ± standard deviation)) ad libitum. EW and ECW contained 19 mEq/L Na+. We assessed ingestive behavior and body fluid balance during the 180 min rehydration period. Results: The dehydration protocol induced hypohydration by ~10 g/kg body weight (~1% of body weight). Cumulative fluid intake was greater in the W trial than in the CW, EW, and ECW trials. Cumulative urine output was greater in the W and CW trials than in the EW trial. The fluid retention ratio was greater in the EW and ECW trials than in the CW trial. Consequently, the final fluid recovery was lower in the CW trial compared to the W, EW, and ECW trials; however, the combination of carbonation and electrolytes (ECW) did not significantly surpass the non-carbonated trials (W and EW) due to the reduced intake volume caused by carbonation. Conclusions: The data suggest that ad libitum ingestion of carbonated water is less effective than plain water for recovering from mild hypohydration (~1% body weight loss), as it reduces spontaneous fluid intake. However, electrolyte supplementation mitigates this reduced recovery by attenuating diuresis and consequently improving fluid retention ratio.
- 出版者・発行元
- 出版者・発行元（英）
- MDPI AG
- 誌名
- 誌名（英）
- Nutrients
- 巻
- 18
- 号
- 12
- 開始ページ
- 1846
- 終了ページ
- 1846
- 出版年月
- 2026年6月8日
- 査読の有無
- 査読有り
- 招待の有無
- 掲載種別
- 研究論文（学術雑誌）
- ISSN
- DOI URL
- https://doi.org/10.3390/nu18121846
- 共同研究・競争的資金等の研究課題