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Julie on Twitter: "Plank with PERFORM! Take the 30 Day 5 min Plank Challenge and build up to a 5 minute plank! Who's in?! Show us your progress #ProfilePerform https://t.co/unqzOjRVxR" / Twitter
I Tried Doing Planks for 5 Minutes Every Day for a Month
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I Tried Planking Every Day for a Month and Had Surprising Results
5 Min Plank Workout - Apps on Google Play
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5-Minute Daily Plank Workout
4 Min Elbow Plank Challenge - Free Intense Workout by More C. - Skimble
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