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This is Scientific American 60-Second Science. I'm Christopher Intagliata. Got a minute?

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Fed up with the polar vortex?

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If so, consider this: Shivering may actually share some of the benefits of exercise, at least in terms of burning fat.

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Researchers studied shivering in a group of 10 men and women.

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First the volunteers rested under a temperature-controlled blanket, which dropped from 80 degrees Fahrenheit to a chilly 54.

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Then they cycled on an exercise bike.

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Researchers took blood samples during both activities.

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Turns out, shivering and exercise spurred muscles to secrete similar amounts of irisin,

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a hormone that tells brown fat to turn up the furnace, even though exercise took 10 times as much effort.

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The researchers say the metabolic pathway may have evolved to save us energy.

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Shivering alone is a costly survival mechanism,

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it relies on muscle contraction to warm us.

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Whereas shivering-activated brown fat can convert chemical energy directly to heat.

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The study is in the journal Cell Metabolism.

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As for your home thermostat?

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Study author Francesco Celi of the NIH likes to keep his at 68, low enough to turn on brown fat.

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And it's a win–win, you'll save money on heat, 'cause you're making your own.

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Thanks for the minute, for Scientific American 60-Second Science. I'm Christopher Intagliata.

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