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Interval training includes bursts of high-intensity efforts sandwiched by periods of less activity. Jonathan Cohen/Flickr hide caption

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Jonathan Cohen/Flickr

Does 1-Minute Interval Training Work? We Ask The Guy Who Tested It

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Despite efforts to reduce pedestrian deaths, many cities have become more dangerous for walkers in recent years. Alessandro Scagliusi / EyeEm/Getty Images/EyeEm hide caption

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Alessandro Scagliusi / EyeEm/Getty Images/EyeEm
Katherine Streeter for NPR

Take A Hike To Do Your Heart And Spirit Good

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Varying speed while walking may make the activity much more effective. iStockphoto hide caption

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iStockphoto

Interval Training While Walking Helps Control Blood Sugar

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Paul Salopek, National Geographic fellow, looks out over Jerusalem during his seven-year journey by foot from Africa to South America. Bassam Almohor/National Geographic hide caption

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Bassam Almohor/National Geographic

Amid A 'Shimmering' Tension, A Walk Through Israel And The West Bank

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