Rumble wants to totally change how you think about boxing workouts

The buzzy new concept—with Sylvestor Stallone on board as an investor— is knocking out these common myths about the sport-turned-boutique fitness favorite.

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Trainers Dani Burrell, Erika Hammond, and Ashley Guarrasi. Photo: Rumble Boxing

Adult Ballet is on the Rise—And Yes, You Should Totally Try it

Here's what to know before your first class.