Running and swimming may temporarily stress kidneys, study finds
NCT ID NCT04929418
First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study looked at how a 10 km run and a 1.5 km swim affect kidney function in 40 healthy, active adults. Researchers used sensitive urine tests to detect subtle kidney changes that standard blood tests might miss. The goal was to better understand temporary kidney stress from intense exercise, not to test a treatment.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
What this could lead to
If successful, this could help identify early signs of kidney stress from exercise, leading to better guidance for athletes and safer training practices.
What could go wrong
This is a small, completed observational study with only 40 participants. Results may not apply to non-athletes or people with health conditions, and the findings are exploratory, not definitive.
Disclaimer
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the original study
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Locations
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Hospital Clínico Universitario
Valladolid, Valladolid, 47003, Spain