How to do the Plank & it's benefits.  Move well, move often, get fit, live!     https://fitness.mercola.com/sites/fitness/archive/2014/12/05/5-plank-benefits.aspx?utm_source=twitter.com&utm_medium=referral&utm_content=twitterfitness_ranart&utm_campaign=20190419_5-plank-benefits

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