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Dr. Subhasree Ray on Twitter: "30 days plank challenge. Are you up for this? Note: Take advice from a professional to master the correct form first and don't push yourself to injury. #
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Jillian Michaels - I'm starting this Monday! Should we do together via Facebook live? Like if your down! #jillianmichaelsapp http://go.jillianmichaels.com/app | Facebook
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