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SESK: Stuff Everyone Should Know · sesk.info/run-hydration-urine-color

Which urine color suggests a runner may need more fluids?

Dark-colored urine can mean dehydration.

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  1. Clear urine
  2. Light yellow urine
  3. Dark-colored urine ✔

Why: MedlinePlus lists dark-colored urine as a sign of dehydration, along with thirst, a dry mouth, and peeing less than usual. Drink fluids before, during, and after long runs.

Huh, didn't know that: Urinating and sweating less than usual is another sign of dehydration.

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Why did the runner bring a straw? To stay well sipped.
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References

Answer: Dark-colored urine. MedlinePlus lists dark-colored urine as a sign of dehydration, along with thirst, a dry mouth, and peeing less than usual. Drink fluids before, during, and after long runs.

  1. Dehydration | MedlinePlus medlineplus.gov/dehydration.html
    Dark-colored urine
    Checked 2026-10-12.

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