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Previous Volume 346:1676 May 23, 2002 Number 21 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

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To the Editor: Spinning is an aerobic activity performed on a stationary bicycle and carried out in groups in enclosed rooms, with instructors increasing and intensifying the workout by varying the resistance of the bike, altering the pace, or "jumping," which is repetitive standing and sitting. This form of recreation is becoming extremely popular, and physicians should be aware of the possibility of gross hematuria in patients who participate in spinning.

A 58-year-old man was spinning five or six times per week. Gross hematuria was noted during routine examinations. Cystoscopy, retrograde ureteroscopy, intravenous pyelography, computed tomographic scanning, and cytologic studies . . . [Full Text of this Article]

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