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    Fitness craze: undergoing temps of -220F

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Fitness craze: undergoing temps of -220F

CNN's Rachel Crane tries out a new fitness craze: exposing herself to temperatures far below zero in hopes of boosting metabolism and reducing inflammation

Fitness craze: undergoing temps of -220F

CNN's Rachel Crane tries out a new fitness craze: exposing herself to temperatures far below zero in hopes of boosting metabolism and reducing inflammation