#1 worst ab exercise

If you've been doing this one ab exercise (and almost everyone does it), then you are making your belly bigger. It's a big mistake. In fact, you're about to discover 3 of the world's most popular ab exercises that you should NEVER ever do! These 3 exercises can actually make your waistline bigger and hurt your back. Women Click Here ---> 3 Ab Exercises That Do NOT Flatten Your Belly (#2 is