You're reading: USA Today: ‘Cool’ workouts could be the next hot fitness trend

The floor is puddled in sweat. Dark circles spread down necklines.

“You can do it!” fitness instructor Kelly Brabants shouts over the screaming music. “Just a few more!”

Twenty-five people are pushing themselves to the limit, but the basement workout room at BFX Studio in Boston remains almost chilly. The thermostat is set to 62 degrees.

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