Cold water submersion attenuates post-submersion aerobic performance and orthostatic tolerance irrespective of partial rehydration with water
Hess HW, Schlader ZJ, Russo LN, Clemency BM, Hostler D
Published in Undersea and Hyperbaric Medicine
Methodology
Controlled crossover study of four-hour 10C water immersion with either no rehydration or 1 L plain-water rehydration, followed by run to exhaustion and lower-body negative pressure testing
Key Findings
Run duration (547 vs 566 s; P=0.79) and orthostatic tolerance did not differ between no rehydration and 1 L water rehydration, though both were worse than control.
Conclusions
Rehydration with plain water alone did not restore performance or orthostatic tolerance after immersion-induced fluid loss - a null result for electrolyte-free rehydration.
Limitations
Very small all-male sample, niche cold-immersion model, no electrolyte-containing comparator arm
Outcomes Measured
Rehydration with 1 L of water following submersion did not offer a performance advantage over no rehydration.
Study Details
Access Study
Disclosures
Funding
Academic (University at Buffalo)
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