title: Freebie Rhabdomyolysis: A Public Health Concern. Spin Class-Induced Rhabdomyolysis.
abstract: BACKGROUND
  Rhabdomyolysis is a pathologic condition in which intracellular muscle constituents leak into the blood circulation. It is usually caused by muscle trauma. "Spinning" is an indoor form of cycling where participants use a special stationary exercise bicycle with a weighted flywheel and undergo high-intensity cycling classes focusing on endurance. There have been several case reports in the literature of exertional rhabdomyolysis following spin class.
  
  
  METHODS
  Our nephrology practices have diagnosed a number of cases of symptomatic patients presenting to our emergency departments following their first spin classes, with histories and creatinine phosphokinase levels diagnostic of exertional rhabdomyolysis.
  
  
  RESULTS
  We present 3 unusual cases of exertional rhabdomyolysis, each occurring after a first spin class. In the first case, rhabdomyolysis developed following 15 minutes of spin class. In the second case, it occurred in a young individual who exercises regularly. In the third case, the patient developed biopsy-proved acute kidney injury secondary to exertional rhabdomyolysis and required hemodialysis.
  
  
  CONCLUSIONS
  The high-intensity exercise associated with "spin class" comes with significant risks to newcomers.
authors.affiliation: Westchester Medical Center, Valhalla, NY. Electronic address: Maureen.brogan@wmchealth.org.
authors.forename: Maureen
authors.initials: M
authors.lastname: Brogan
authors.affiliation: Westchester Medical Center, Valhalla, NY.
authors.forename: Rudrick
authors.initials: R
authors.lastname: Ledesma
authors.affiliation: Westchester Medical Center, Valhalla, NY.
authors.forename: Alan
authors.initials: A
authors.lastname: Coffino
authors.affiliation: Westchester Medical Center, Valhalla, NY.
authors.forename: Praveen
authors.initials: P
authors.lastname: Chander
mesh_terms: D000328:Adult; D001642:Bicycling; D003402:Creatine Kinase / Q000097:blood; D005260:Female; D006801:Humans; D008297:Male; D005082:Physical Exertion; D012206:Rhabdomyolysis / Q000209:etiology*; D055815:Young Adult
chemical_list: D003402:Creatine Kinase
keywords: Acute kidney injury; Exertional rhabdomyolysis; Public health concern; Spin class