Subject: Flatten your stomach by leaning against a post...
Yeah, I know that SOUNDS really strange...
But I've got an exercise for you that literally IS just that.
The key is in HOW you lean against the post...
Nick Nilsson
The Mad Scientist of Muscle
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https://www.fitstep.com/30-second-ab-solution/opt-in/free-video-learn2.htm
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