Are you doing planks safely? Most people are doing planks in a way that completely defeats the purpose. If your hips are sagging, your back is arched, or you are sucking your belly button in, you are not training your core. You are irritating your spine.

Are you doing planks safely?<br />Most people are doing planks in a way that completely defeats the purpose. If your hips are sagging, your back is arched, or you are sucking your belly button in, you are not training your core. You are irritating your spine.