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A recent study conducted by researchers at the University of Tsukuba has found that consuming ice slurry before endurance exercise in hot conditions can help mitigate hyperventilation and cerebral hypoperfusion. These physiological responses, which can impair performance and increase the risk of heat stroke, are triggered by rising core temperatures during prolonged physical exertion in the heat.
The study, published in Medicine & Science in Sports & Exercise, compared the effects of pre-exercise ingestion of ice slurry to the same beverage consumed at a temperature of 37°C. The research involved young male participants performing endurance exercises under hot environmental conditions.
Key Findings
The study revealed that consuming ice slurry led to a reduction in core temperature during exercise, decreased total lung air exchange (ventilation), and increased the cerebral blood flow index. These physiological benefits are crucial for maintaining exercise performance and reducing the risk of heat-induced impairments.
However, the study also noted that participants who experienced severe gastrointestinal distress, such as stomachaches and diarrhea, did not show the same improvements in ventilation or cerebral blood flow. Excluding these individuals, the researchers found that ice slurry ingestion significantly enhanced endurance performance, particularly in the later stages of exercise.
Implications for Athletes and Exercise Enthusiasts
These findings suggest that pre-exercise ice slurry ingestion could serve as a practical strategy to combat heat-related physiological stress during endurance activities. By alleviating hyperventilation and cerebral hypoperfusion, athletes may experience improved performance and reduced risk of heat stroke under high-temperature conditions.
However, the study also highlights the need to consider individual tolerance to ice slurry ingestion, as gastrointestinal discomfort could negate its benefits for some individuals.
Future Applications
This research contributes to a growing body of evidence supporting the use of cooling strategies in sports and occupational settings where heat stress is a concern. Future studies may explore additional methods to optimize cooling techniques while minimizing potential adverse effects.
Reference: Akira Katagiri et al, Ice Slurry Mitigates Hyperventilation and Cerebral Hypoperfusion, and May Enhance Endurance Performance in the Heat, Medicine & Science in Sports & Exercise (2025). DOI: 10.1249/MSS.0000000000003662.
Disclaimer: This article is for informational purposes only and does not constitute medical advice. Individuals considering ice slurry ingestion before exercise should consult with a healthcare professional, particularly if they have a history of gastrointestinal sensitivity or other medical conditions.
