Recently there’s been a TON of research coming out of Europe about the true function of abs. Dr. Stuart McGill, a world renowned spine health expert found:
“Herniation (posterior and posterior-lateral regions of the annulus) occurred with relatively modest joint compression but with highly repetitive flexion/extension moments. Increased magnitudes of axial compressive force resulted in more frequent and more severe disc injuries.”
Ok. Soo. What all that essentially means is that these high volume (and out-dated) ab routines won't give you a 6-pack, and can actually cause disk herniation. Not good.
Additional research shows that your abs are actually supposed to fire before you make any movement. For example, before you even lift your arm, it's your abs responsibility to stabilize your spine and brace for movement. #0-6PackAbsReview