A plank is more difficult than it looks. You have to use all of your muscle groups, including your core, abs, arms, back, shoulders, glutes and legs. It’s normal to struggle to do a plank. Many of my ...
Mallory Creveling is a health and fitness writer and ACE-certified personal trainer. Her work appears across several national publications, including SELF, Prevention, Runners World, and Men's Journal ...
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