How (and Why) to Do Copenhagen Planks
via lifehacker.com
Short excerpt below. Read at the original source.
We last saw Copenhagen planks in our rundown of the best bodyweight exercises that actually build strength. But it’s an under-appreciated exercise, and deserves a spotlight of its own. The Copenhagen plank looks a bit like a side plank: You’re leaning on your hand or elbow, other arm away from the ground, trying to hold […]