How to Do a Plank With Proper Form So You Can Work Every Part of ... - SELF
https://www.self.com/story/how-to-do-a-plank
webSep 30, 2021 · What is a plank, and what muscles does it work? When people say “plank,” they generally are referring to the forearm plank, in which your elbows and forearms are on the ground, rather than...
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