You're going to hate me for this one...

This is one of my very favorite "secret weapon" core strength exercises.

And when you're done, you're going to feel like you can punch through a brick wall.

Check it out here...

And try to not to sneeze for a couple of days after doing this one for the first time.

(not kidding)

Nick Nilsson
The Mad Scientist of Muscle

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https://www.madscientistofmuscle.com/1-exercises/abdominal-exercises/ab-rippers.htm
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