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This is Scientific American 60-Second Science. I'm Karen Hopkin. This'll just take a minute.

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If you're like me, you know that multitasking does not always save time.

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You slow down or make mistakes that require fixing.

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But maybe I'm just doing the wrong things.

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Because a new study shows that people on a stationary bike pedaled faster when they simultaneously tackled some sort of mental test.

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Even the researchers were surprised by that result.

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They had originally set out to demonstrate what other studies have shown: that when people try to do two things at once, they do both more poorly.

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Their counterintuitive finding is in the journal PLoS ONE.

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In the experiment, subjects were asked to complete various cognitive jobs that ranged in difficulty,

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everything from saying 'go' when they saw a blue star on a projection screen to remembering a long list of numbers and then repeating them back in reverse order.

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They tackled these tasks once while sitting in a quiet room and again while on the bike.

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Turns out, cyclists rode 25 percent faster when they were distracted by some mental gymnastics,

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but only when the tasks were relatively easy.

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When confronted with tough brain-teasers, their cycling speeds were about the same as when they had nothing in particular to think about.

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And in case you're wondering, the participants' cycling neither helped nor hindered their brain function.

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The findings could point toward new programs in which we get better workouts simply by using our heads.

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Thanks for the minute, for Scientific American 60-Second Science. I'm Karen Hopkin.

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