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Plank challenge- this is awesome!
Ab work out challenge
Interesting. I think i'm gonna try this
Challenges, Challenges, Challenges take your pick!
30 Day Challenge.
30 Day Plank Challenge
Looking for a workout routine to challenge you and help you get a ripped & fit physique? Find one that will work for you here!
Want A Flat Stomach In One Month? I may have to do this when my 30 day plank challenge is over! :)
5 minute plank challenge
Pumped-Up Planks: Workouts: Self.com:Want to get flat abs in just a few moves? Try the plank, an all-purpose move that firms and tones your midsection. Try a basic plank or one of these seven effective variations.
30 day challenge