Wellness trend or trash? Reporter tests cold plunge therapy.

Cold plunges date to the ancient Greeks and, more recently, have been anointed by Gwyneth Paltrow, Lizzo, and Joe Rogan. In Oregon a company sells a handcrafted version made of teak that costs $28,000, and any well-destination worth the journey offers a cold plunge add-on. And in mid-January the concept touched down on the Rose Kennedy Greenway, cqin the form of an outdoor “Winter Sauna Village.” It will be in residence through March, and is part of an effort to enliven the city in winter.