"Log rolling is a really unique, traditional sport that has a really rich history," she says. "It's a sport that came out of a way of life, out of the logging industry."
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Since real logs are too heavy to lift into a pool, Delaney's team invented a plastic log that's filled with water.
Watch the video above to see this unique sport in action!
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Click here to learn more about how Delaney is bringing log rolling to the Bay Area.
VIDEO: World champion log roller brings her sport to Vallejo
World champion log roller brings her sport to Vallejo