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Study: Alternate walking and running to save energy, maintain endurance
Date:1/30/2013

COLUMBUS, OhioForget "slow and steady wins the race." A new study shows that, at least sometimes, the best way to conserve energy and reach your destination on time is to alternate between walking and runningwhether your goal is the bus stop or a marathon finish line.

In the January 30, 2013 issue of the Journal of the Royal Society Interface, researchers examined how people budget their time as they travel on foot to reach a destination at a particular appointed time. The study found that when people have neither too much time nor too little time to reach their destination, they naturally switch back and forth between walking and running, which turns out to be the best strategy for saving energy.

The study is the first of its kind not conducted on treadmills, and it supports the notion that the human body has an innate sense of how to vary speed to optimize energy when we're on the move in our natural environment.

"We don't live our lives on a treadmill," said Manoj Srinivasan, co-author of the study and assistant professor of mechanical engineering at Ohio State University. "To better understand how we move in our everyday life, and how our spontaneous movements relate to energy expenditure, we have to study what people do away from the treadmill. Once we have a good enough understanding of how we naturally move to conserve energy, we can build a solid theory and apply it in practical waysdesigning better shoes, or better prosthetics that let people walk using less energy."

In tests, 36 college students were asked to travel a distance a little longer than a football field, either on pavement outdoors or inside a school hallway. They were given a stopwatch, and told to arrive at their destination at a specific timenot before and not after, but right on time. The students were free to set their own pace to achieve that goal, and were not told whether to walk or run.

Sometimes the students were told to make t
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Contact: Pam Frost Gorder
Gorder.1@osu.edu
614-292-9475
Ohio State University
Source:Eurekalert

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