You don't need complex machinery or expensive gym memberships to sculpt great abs. in fact, the only real piece of kit you need is a few square feet of floor. The best abs exercises are ones that work more than just one part of your abdominal muscles. Yes, there are multiple layers of muscles that make up the full abdominal wall. And even though you can't see or really feel them all, they're really important for keeping your entire body strong and stable. ~ Berceste