Celebrity Fans: Lady Gaga, Katie Holmes, Kelly Ripa, Chelsea Clinton, Kyra Sedgwick, Ashley Tisdale, Nicole Kidman
Famous for its mix of intense cycling and upper-body toning, SoulCycle has Hollywood's hottest stars pedaling their way to one insane cardio workout. With the entire class pumping to the beat of heart-pounding music in a dimly lit studio while instructors shout out motivational sayings, it's easy to become obsessed. While it may be one of the more expensive group fitness classes (prices start at $32 per session), it's well worth it—you can burn up to 700 calories in 45-minutes!
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