Yeah 50% more muscle activation; too bad nobody in the audience understands that when doing the traditional crunch shown vs. using the ‘Ab Coaster’ that the hip flexors are involved in the latter and thus account for the '50% more muscle activation.
Yeah 50% more muscle activation; too bad nobody in the audience understands that when doing the traditional crunch shown vs. using the ‘Ab Coaster’ that the hip flexors are involved in the latter and thus account for the '50% more muscle activation.