Planks Still Work Even If You Don’t Hold Them Forever
We’ve told you how to do planks, and why to do planks, and what to do instead of planks when you get bored of planks. But there’s a critical thing about planks we forgot to tell you: you don’t have to hold the position until you collapse.
from Lifehacker http://ift.tt/2efrVrV
via IFTTT