Medicine: Jogger's Ills

Perils on the path to fitness

Paul Zarmunsky. 40. of Englewood.

N.J., runs ten miles a day to keep fit.

He thus had reason to expect that the doctor who gave him his annual physical would marvel at his fat-free midsection and low heart rate. Instead, the doctor seemed more interested in the results of Zarmunsky's laboratory tests, one of which showed the abnormal presence of protein, red blood cells and other substances in his urine. This condition can be an indication of nephritis, a potentially serious kidney disease. It can also be a sign of an apparently benign condition that is likely to...

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