Most people think their abs are just a six-pack. They’re wrong.

Your core is made of four abdominal layers, and it’s the deepest one that pulls your belly in, flattens your waistline, and supports your spine from within. The Knee Folds teach you how to actually find and train that deep layer—by using the weight of your legs as resistance to challenge your core.

Do them right, and you’ll learn how to pull your abdominals in and up, instead of pushing them out-pooching. That’s the secret to a flat, firm belly—no matter what you ate, no matter how bloated you feel.

Simple. Subtle. And so Powerful.
This is the exercise that makes your core real and your belly flatest it can get.