nytimes October 1, 2021 9:00pm As Workouts Intensify, a Harmful Side Effect Grows More Common #rhabdomyolysismuscledisease #exercise #muscles #bicyclesandbicycling #americanjournalofmedicine #soulcyclellc #news As Workouts Intensify, a Harmful Side Effect Grows More Common (Published 2017) Newbies to spin classes can land in the emergency room, as doctors say they are seeing more of the rare but dangerous rhabdomyolysis.