Abstract
Midstream urine samples were examined by phase-contrast microscopy before and immediately after 48 subjects participated in a long-distance run. Minor abnormalities were found in six samples before exercise. Eighteen subjects developed proteinuria and five haematuria on dipstick testing after exercise. Forty-four subjects had increased urinary red-cell counts after exercise; of these, 33 had counts above the normal range (800/ml). In all subjects urinary red cells were dysmorphic both before and after exercise, indicating a glomerular source. Ten subjects developed red-cell casts and 42 showed an increase in hyaline and hyaline-granular casts after exercise. There were modest increases in urinary white-cell counts in 35 subjects but little change in urine pH or osmolality with exercise. This study confirms that urinary red-cell counts commonly increase appreciably after exercise. The dysmorphic appearance of the red cells together with the presence of red-cell casts indicates a glomerular source for this common form of exercise haematuria.
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- Birch D. F., Fairley K. F. Haematuria: glomerular or non-glomerular? Lancet. 1979 Oct 20;2(8147):845–846. doi: 10.1016/s0140-6736(79)92191-3. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Blacklock N. J. Bladder trauma in the long-distance runner: "10,000 metres haematuria". Br J Urol. 1977 Apr;49(2):129–132. doi: 10.1111/j.1464-410x.1977.tb04084.x. [DOI] [PubMed] [Google Scholar]
- Fairley K. F., Birch D. F. Hematuria: a simple method for identifying glomerular bleeding. Kidney Int. 1982 Jan;21(1):105–108. doi: 10.1038/ki.1982.16. [DOI] [PubMed] [Google Scholar]
- Fassett R. G., Horgan B. A., Mathew T. H. Detection of glomerular bleeding by phase-contrast microscopy. Lancet. 1982 Jun 26;1(8287):1432–1434. doi: 10.1016/s0140-6736(82)92451-5. [DOI] [PubMed] [Google Scholar]
- Fred H. L., Natelson E. A. Grossly bloody urine of runners. South Med J. 1977 Dec;70(12):1394–1396. doi: 10.1097/00007611-197712000-00005. [DOI] [PubMed] [Google Scholar]
- GARDNER K. D., Jr Athletic pseudonephritis; alteration of urine sediment by athletic competition. J Am Med Assoc. 1956 Aug 25;161(17):1613–1617. doi: 10.1001/jama.1956.02970170009003. [DOI] [PubMed] [Google Scholar]
- Kincaid-Smith P. Quantitative counts in urine microscopy. Med J Aust. 1979 Jun 30;1(13):605–605. doi: 10.5694/j.1326-5377.1979.tb119397.x. [DOI] [PubMed] [Google Scholar]
- Siegel A. J., Hennekens C. H., Solomon H. S., Van Boeckel B. Exercise-related hematuria. Findings in a group of marathon runners. JAMA. 1979 Jan 26;241(4):391–392. doi: 10.1001/jama.241.4.391. [DOI] [PubMed] [Google Scholar]