Lady Gaga, Kim Kardashian, Harry Styles and Joe Rogan have all taken the plunge ... in popularity right now — global sales of cold plunge pools are expected to exceed $550 million US by 2031 ...

Joe Rogan has revealed details about a skiing ... and a combination of sauna and cold plunge sessions to aid his recovery. He added: "I was doing a lot of rolling in the sauna, cold plunge ...