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lbliss | all galleries >> The Badwater Ultramarathon 07.11.2005 > Runner volunteers collected urine in containers. Urine output and specific gravity (a measure of hydration) was recorded.
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Runner volunteers collected urine in containers. Urine output and specific gravity (a measure of hydration) was recorded.

Runner volunteers collected urine in containers. Urine output and specific gravity (a measure of hydration) was recorded.


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