Want to Improve Your Running, Lifting, and more? Pull In Your Anus

"If you study old forms of martial arts or yoga, you know that there are like horse stance exercises and movements that you perform where you draw the belly button in, and, strange as this sounds, you pull the anus up in. So you have like a going down and going up effect that I believe they call a 'root lock.' Because it's the center, the true core of your body, and you're locking it in by activating the pelvis basin."