Abstract
To the Editor.— I was pleased to see the excellent article by Siegel et al (241:391, 1979). The problem of exercise related to hematuria has long been of interest to urologists. With the increasing popularity of running in this country in the last several years, the association of gross hematuria with jogging and, more specifically, with marathon running is becoming a more frequently seen problem in the office of the urologist. The syndrome that the authors describe does indeed appear to have a different cause than the renal-based hematurias previously associated with contact sports, particularly boxing. However, I think a word of caution is in order, in that the cause suggested by Blacklock (their reference 3), trauma at the bladder neck area related to the pressure of the interabdominal contents transferred through the posterior bladder wall and to the bladder neck area as being the cause of the bleeding, is
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