運動前の水素富化冷水摂取が暑熱環境における持久パフォーマンスおよび血中乳酸応答に与える影響
This double-blind crossover study examined three internal pre-cooling strategies in a hot environment: hydrogen-rich cold water ingestion (HRCW), cold water combined with external pre-cooling (IEPC), and cold water alone as a control. Participants completed a 20 m shuttle run test after 30 minutes under each condition. Compared with the control, HRCW produced significant improvements in maximal aerobic speed, shuttle run repetitions, blood lactate levels, perceived exertion ratings, and mood scores. Both HRCW and IEPC significantly reduced body temperature, whereas heart rate did not differ meaningfully across conditions. These findings indicate that hydrogen-rich cold water ingestion can attenuate heat stress and support endurance capacity in warm environments.
Ingestion of hydrogen-rich cold water is thought to suppress core temperature elevation and reduce lactate accumulation, thereby supporting aerobic capacity and perceived effort during exercise in the heat.
Hydrogen-rich water is a low-risk delivery route, but the achievable systemic hydrogen dose is bounded. For clinical applications, inhalation is the most efficient route; inhalation, however, carries explosion risk, and concentration matters (empirical LFL of 10% applies to inhalation environments; high-concentration devices are documented in the Consumer Affairs Agency accident database and are not recommended).
See also:
https://h2-papers.org/en/papers/40731803