The Best Core Exercise Ever

In His Book "The Path To Athletic Power"

Boyd Epley explains the "Push-Pull Circuit" as one of the best exercises for Core Conditioning.

Here is a summary of his reasons.

1. Ground Base - To express maximum force you must have your feet on the ground.

2. Reciprocal Action - One side of the body flexes as the other side extends.

3. Inner and Outer Core - Stability starts with the deep inner unit muscles, which are the primary stabilizers. The outer muscle units help stabilize the pelvis, hips and back as well as promote "Reciprocal Action"

I agree with everything coach Epley has to say, in fact It would probably be in my best interest to believe what he says all the time. My question is this.

Do you need to have an expensive machine for this exercise?

Won't the Renegade Row with Kettlebells work just as well if not better because of the position of the body(a push-up position)?

Check out the videos below and decide for yourself!