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1 .This is Scientific American 60-Second Science. I'm Christopher Intagliata. Got a minute?
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2 .Fed up with the polar vortex?
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3 .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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4 .Researchers studied shivering in a group of 10 men and women.
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5 .First the volunteers rested under a temperature-controlled blanket, which dropped from 80 degrees Fahrenheit to a chilly 54.
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6 .Then they cycled on an exercise bike.
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7 .Researchers took blood samples during both activities.
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8 .Turns out, shivering and exercise spurred muscles to secrete similar amounts of irisin,
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9 .a hormone that tells brown fat to turn up the furnace, even though exercise took 10 times as much effort.
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10 .The researchers say the metabolic pathway may have evolved to save us energy.
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11 .Shivering alone is a costly survival mechanism,
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12 .it relies on muscle contraction to warm us.
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13 .Whereas shivering-activated brown fat can convert chemical energy directly to heat.
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14 .The study is in the journal Cell Metabolism.
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15 .As for your home thermostat?
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16 .Study author Francesco Celi of the NIH likes to keep his at 68, low enough to turn on brown fat.
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17 .And it's a win–win, you'll save money on heat, 'cause you're making your own.
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18 .Thanks for the minute, for Scientific American 60-Second Science. I'm Christopher Intagliata.
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