Exercise-induced upper extremity rhabdomyolysis and myoglobinuria in shipboard military personnel.

During a 6-month Amphibious Task Force deployment to the Mediterranean Sea, five sailors and Marines were admitted to the ship's ward with severe upper extremity pain, elevated serum muscle enzymes, and a urinalysis dip positive for blood in the absence of microscopic hematuria-a finding highly suggestive of myoglobinuria. Each patient had begun a vigorous upper-extremity work-out program in the ship's weight room 1 to 3 days prior to development of symptoms. All responded well to vigorous intravenous hydration, mannitol diuresis, alkalinization of the urine, and skeletal muscle rest. No patient developed acute tubular necrosis. With increasing emphasis on physical fitness and body building, this condition is likely to become more frequent. The most important preventive measure is gradual conditioning. Awareness of this entity and early aggressive management are necessary to avoid the potentially severe complication of renal failure.