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January 26, 1979

Exercise-Related Hematuria: Findings in a Group of Marathon Runners

Author Affiliations

From the Department of Medicine (Drs Siegel and Solomon), Peter Bent Brigham Hospital and Channing Laboratory (Dr Hennekens), Harvard Medical School, Boston, and the George Washington University Hospital (Dr Boeckel), Washington, DC.

JAMA. 1979;241(4):391-392. doi:10.1001/jama.1979.03290300033023

Sequential urine specimens were obtained from 50 marathon runners before, immediately after, and on three successive days following a marathon race. All prerace samples were normal, but nine (18%) of the 50 postrace urinalyses showed gross (one specimen) or microscopic (eight specimens) hematuria. No formed elements other than RBCs were seen, and all abnormalities cleared by 48 hours. Exercise-related hematuria appears to be a frequent, self-limited, and benign condition. Physicians should be aware of its occurrence and reserve extended testing for cases in which abnormalities persist beyond 48 to 72 hours.

(JAMA 241:391-392, 1979)

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