Add Yahoo as a preferred source to see more of our stories on Google. When it comes to building core strength, crunches have fallen out of favor and the plank is now considered the gold standard.

Add Yahoo as a preferred source to see more of our stories on Google. Ah, the plank. It may just be one of the most intimidating exercises. Anyone who has shook their way through one knows that the ...

The key is knowing how to do a plank, however. As good as the exercise is, you have to do it exactly right to reap the benefits. As one of the best core exercises to do at home, the plank can also ...