Could a winter dip boost your blood? scientists investigate

NCT ID NCT06223087

Completed Knowledge-focused Sponsor: University School of Physical Education, Krakow, Poland Source: ClinicalTrials.gov ↗

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at how regular winter swimming—bathing in cold open water during winter—affects blood cells, blood flow, and stress-fighting enzymes in healthy men. Researchers compare winter swimmers to a control group who never swim in cold water and have a sedentary lifestyle. Blood samples are taken before and after the winter swimming season to measure changes.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance: winter swimming (cold water exposure)
What this could lead to: If beneficial changes are confirmed, this could point toward cold exposure as a simple, low-cost way to support blood health and antioxidant defenses.
What could go wrong: This is a small observational study with only 30 men, so results may not apply to women, older adults, or people with health conditions. It cannot prove cause and effect.

This is an AI summary of the original study and may miss details. Read our disclaimer.

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Conditions

The condition(s) this trial relates to.

common cold Motor Activity

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

COLD EXPOSURE

Contacts and locations

Locations

University of Physical Education

Krakow, 31571, Poland

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