Related Experiment Videos
Cold-water acclimation does not modify whole-body fluid regulation during subsequent cold-water immersion
J M Stocks1, M J Patterson, D E Hyde
1Department of Biomedical Science, University of Wollongong, Wollongong, NSW, Australia.
European Journal of Applied Physiology
|March 3, 2004
Summary
Cold-water acclimation did not significantly alter body fluid distribution. However, acute cold exposure consistently shifts fluid from cells to the interstitial space, regardless of acclimation status.
Area of Science:
- Physiology
- Environmental Medicine
- Human Physiology
Background:
- Understanding how the body regulates fluid balance during cold exposure is crucial for performance and health.
- Cold-water acclimation is proposed to influence physiological responses, including fluid shifts.
Purpose of the Study:
- To investigate the effects of a 14-day cold-water acclimation protocol on whole-body fluid regulation.
- To differentiate changes in intracellular and extracellular fluid compartments during cold-water stress.
Main Methods:
- Seven healthy males underwent a 14-day cold-water acclimation protocol.
- Tracer-dilution methods were used to measure intracellular and extracellular fluid volumes.
- Cold-water stress tests and immersions were conducted at specific intervals.
Main Results:
- Acute cold-water immersion caused a reduction in intracellular and plasma volumes, with a simultaneous expansion of interstitial fluid volume.
- This fluid shift pattern persisted across repeated cold exposures.
- No significant changes in total body water distribution, plasma osmolality, protein, electrolytes, or key hormones were observed due to acclimation.
Conclusions:
- A 14-day cold-water acclimation regimen did not induce significant alterations in overall body fluid distribution or hormonal responses.
- Acute cold-water immersion consistently leads to a displacement of fluid from intracellular to interstitial compartments, irrespective of acclimation.