Transcript for Body's Fat-Burning Mechanism Identified
We all -- -- the dinner hour and there is new signs tonight that reveals that inside -- own bodies is a secret weapon that if revved up can help us burn the fat. But there is one catch you -- like a cold here's ABC's -- Davis. It's a potential game changer in the battle of the -- Burn calories simply by cooling off. Over a long period of the fine. That would be a significant advantage in or fight against -- -- In a new study male subjects wearing suits designed for jet fighter pilots were exposed to 39 degree temperatures for several hours. Their metabolism jumped by 80%. And while lounging around for three hours their -- burned an extra 250. Calories. The equivalent of thirty minutes on the treadmill -- said the wall. I said that that's almost them do. The secret weapon the cold. It appears to activate certain fat called brown fat which acts like a furnace heating up the body causing it to burn calories. Scientists believe just standing in this ice cold water could activate this -- As my body tries to maintain its normal 98 point six degrees actually burning about many calories as I would during a brisk walk. Former NASA scientist ray -- ice is convinced the cold helped him lose fifty pounds you still have to exercise you can also use the thermal environment that sort of a multiplying effect more research needs to be done and experts caution against going to extremes. But the message for now may be that winter might just be a great time -- get out for a brisk walk. Lindsey Davis ABC news New York.
This transcript has been automatically generated and may not be 100% accurate.