A long but interesting article about the weight loss miracles claimed for cold:
…..Cronise got the idea back in 2008 while watching a TV program about Michael Phelps. The coverage claimed that, while training, the Olympic swimmer ate 12,000 calories a day. At the time, Cronise was on a diet of 12,000 calories per week. (He was carrying 209 pounds on his 5’9? frame and wanted to get back down to 180.) Something didn’t add up. Even if Phelps had an exceptionally high metabolism and swam three hours a day, he still should have turned into a blob. Then it hit Cronise: Phelps was spending hours every day in water, which was sucking heat from his body. He was burning extra calories just to maintain his core temperature of 98.6.
That fall, Cronise grew obsessed. He avoided warmth altogether: He took cool showers, wore light clothing, slept without sheets, and took 3-mile “shiver walks” in 30-degree weather wearing a T-shirt, shorts, gloves, and earmuffs. In six weeks he shed 27 pounds, nearly tripling his weight-loss rate without changing his calorie-restricted diet.
Cronise set off a full-blown weight-loss fad. In 2010, he talked about his self-experimentation in a presentation, and then the Pied Piper of body-hacking, Tim Ferriss, name-checked Cronise and prescribed 20-minute ice baths in The 4-Hour Body. When the book came out, ABC’s Nightline aired a segment on Ferriss and “thermal dieting.” Right on cue, bloggers began documenting their own cold-exposure experiences. On websites and forums like Fatburningman.com, diehards started sharing tips on making DIY ice packs. “My body,” one guy confessed after sleeping with ice-filled Ziplocs on his abs, “felt like it had been beaten with heavy sticks.” Today the trend has gone truly mass: Best-selling diet books like Six Weeks to OMG: Get Skinnier Than All Your Friends urge readers to take cold baths. On Today, Kathie Lee Gifford praised a company called FreezeAwayFat, which sells Lycra bike shorts with pockets for frozen gel packs. Her personal review: “My belt is now one notch smaller.”
Just one problem: There’s not much rigorous science behind any of this. It’s exceedingly difficult to quantify how environmental temperature affects an individual’s metabolism. Studies have shown cold exposure can boost the metabolism anywhere from 8 to 80 percent, depending on a slew of variables including the degree and duration of the exposure, whether you’re shivering, your diet, and physiological factors like age, gender, and fat mass.
Scientists are racing to separate the real science from the pseudo. They’re investigating the precise mechanisms by which the body adjusts to cold temperatures and reaching new insights into the ways our bodies burn fat. They’re even trying to come up with a new kind of weight-loss pill—a longtime ambition of the pharmaceutical industry—that can mimic those processes and make us thinner faster, with less effort….
Full article: http://www.wired.com/playbook/2013/02/ff-cold-weight-loss/